RHSA-2026:67909
Vulnerability from csaf_redhat - Published: 2026-09-16 12:36 - Updated: 2026-09-16 23:35Summary
Red Hat Security Advisory: libevent security update
Severity
Important
Notes
Topic: An update for libevent is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The libevent packages provide an abstract asynchronous event notification library.
Security Fix(es):
* libevent: Libevent: Denial of Service via malformed RPC data (CVE-2026-63383)
* libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption (CVE-2026-63387)
* libevent: Libevent: Memory corruption due to use-after-free (CVE-2026-63381)
* libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header` (CVE-2026-63384)
* libevent evhttp: Multiple HTTP Parser Bugs Enable Request Smuggling (CVE-2026-63382)
* libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling (CVE-2026-63388)
* libevent: Libevent: HTTP header handling bugs create risk of access control bypass. (CVE-2026-63385)
* libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning (CVE-2026-63379)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Libevent, an event notification library. An unauthenticated remote attacker can exploit a vulnerability where chunked HTTP (Hypertext Transfer Protocol) trailers are incorrectly merged into request headers. This allows the attacker to place security-sensitive fields in trailers, causing an upstream proxy and the Libevent application to interpret different effective headers. This can lead to header smuggling, authorization bypass, proxy-header spoofing, or cache poisoning.
6.5 (Medium)
Affected products
Fixed
26 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in Libevent, an event notification library. A use-after-free vulnerability exists in the `evbuffer_add_buffer_reference` function when it processes an output buffer with a zero length. This can lead to a dangling pointer, which an attacker could exploit to cause memory corruption or crash the application.
6.6 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Moderate
A flaw was found in libevent. The evhttp parser in libevent's http.c component inconsistently handles HTTP Transfer-Encoding headers and chunked framing. This inconsistency allows an unauthenticated remote attacker to desynchronize request boundaries when libevent is used behind a proxy. Successful exploitation could lead to request smuggling, potentially bypassing access controls or poisoning caches.
7.7 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Important
A flaw was found in Libevent, an event notification library. A remote attacker could exploit an out-of-bounds read vulnerability in the `decode_tag_internal()` function by sending specially crafted, attacker-controlled tagged RPC (Remote Procedure Call) data. This could lead to a denial of service, causing the process that decodes the data to crash.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Important
A flaw was found in Libevent. An incorrect integer conversion in the `evtag_unmarshal_header` function allows a remote attacker to provide a specially crafted payload length. This can lead to a wrapped large allocation request, resulting in a denial of service (DoS) for the affected system.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Important
A flaw was found in libevent. The evhttp_decode_uri_internal function in http.c decodes percent-encoded %00 bytes into literal NUL characters without rejecting them, allowing an attacker to craft a URI such as /admin/secret%00.jpg where extension-based access checks see .jpg but the server processes /admin/secret, bypassing path-based access controls. Additionally, evhttp_header_is_valid_value accepts obsolete HTTP header line folding (CRLF followed by SP/HT), which RFC 9112 states new implementations should reject, creating a header injection vector in proxy chains where the frontend rejects obs-fold but libevent accepts it. This could lead to access control bypass, header injection, or request smuggling.
7.7 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Important
A flaw was found in Libevent, an event notification library. An off-by-one stack buffer overflow exists in the `dnsname_to_labels` function when processing a name-bearing DNS record. A remote attacker could send a specially crafted DNS server response, which may lead to a crash or corruption of the process, resulting in a denial of service or potential information disclosure and integrity impact.
8.6 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Important
A flaw was found in Libevent. A heap out-of-bounds write vulnerability in the `bufferevent_socket_set_conn_address_` function allows an unauthenticated local peer to achieve arbitrary code execution. By connecting to an AF_UNIX listener, an attacker can overwrite critical heap data, leading to memory corruption and potentially full control over the affected system. This can severely impact the confidentiality, integrity, and availability of data and services.
8.4 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2026-63379
Threats
Impact
Important
References
69 references
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for libevent is now available for Red Hat Enterprise Linux 10.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
"text": "The libevent packages provide an abstract asynchronous event notification library.\n\nSecurity Fix(es):\n\n* libevent: Libevent: Denial of Service via malformed RPC data (CVE-2026-63383)\n\n* libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption (CVE-2026-63387)\n\n* libevent: Libevent: Memory corruption due to use-after-free (CVE-2026-63381)\n\n* libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header` (CVE-2026-63384)\n\n* libevent evhttp: Multiple HTTP Parser Bugs Enable Request Smuggling (CVE-2026-63382)\n\n* libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling (CVE-2026-63388)\n\n* libevent: Libevent: HTTP header handling bugs create risk of access control bypass. (CVE-2026-63385)\n\n* libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning (CVE-2026-63379)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
},
{
"category": "legal_disclaimer",
"text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
"title": "Terms of Use"
}
],
"publisher": {
"category": "vendor",
"contact_details": "https://access.redhat.com/security/team/contact/",
"issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
"name": "Red Hat Product Security",
"namespace": "https://www.redhat.com"
},
"references": [
{
"category": "self",
"summary": "https://access.redhat.com/errata/RHSA-2026:67909",
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/updates/classification/#important",
"url": "https://access.redhat.com/security/updates/classification/#important"
},
{
"category": "external",
"summary": "2520654",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520654"
},
{
"category": "external",
"summary": "2520655",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520655"
},
{
"category": "external",
"summary": "2520657",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520657"
},
{
"category": "external",
"summary": "2520658",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520658"
},
{
"category": "external",
"summary": "2520660",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520660"
},
{
"category": "external",
"summary": "2520661",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520661"
},
{
"category": "external",
"summary": "2520666",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520666"
},
{
"category": "external",
"summary": "2520667",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520667"
},
{
"category": "self",
"summary": "Canonical URL",
"url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67909.json"
}
],
"title": "Red Hat Security Advisory: libevent security update",
"tracking": {
"current_release_date": "2026-09-16T23:35:16+00:00",
"generator": {
"date": "2026-09-16T23:35:16+00:00",
"engine": {
"name": "Red Hat SDEngine",
"version": "5.3.21"
}
},
"id": "RHSA-2026:67909",
"initial_release_date": "2026-09-16T12:36:40+00:00",
"revision_history": [
{
"date": "2026-09-16T12:36:40+00:00",
"number": "1",
"summary": "Initial version"
},
{
"date": "2026-09-16T12:36:40+00:00",
"number": "2",
"summary": "Last updated version"
},
{
"date": "2026-09-16T23:35:16+00:00",
"number": "3",
"summary": "Last generated version"
}
],
"status": "final",
"version": "3"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Red Hat Enterprise Linux AppStream (v. 10)",
"product": {
"name": "Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:10.2"
}
}
},
{
"category": "product_name",
"name": "Red Hat Enterprise Linux BaseOS (v. 10)",
"product": {
"name": "Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:10.2"
}
}
}
],
"category": "product_family",
"name": "Red Hat Enterprise Linux"
},
{
"branches": [
{
"category": "product_version",
"name": "libevent-devel-0:2.1.13-1.el10_2.aarch64",
"product": {
"name": "libevent-devel-0:2.1.13-1.el10_2.aarch64",
"product_id": "libevent-devel-0:2.1.13-1.el10_2.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-devel@2.1.13-1.el10_2?arch=aarch64"
}
}
},
{
"category": "product_version",
"name": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"product": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"product_id": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debugsource@2.1.13-1.el10_2?arch=aarch64"
}
}
},
{
"category": "product_version",
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"product": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"product_id": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debuginfo@2.1.13-1.el10_2?arch=aarch64"
}
}
},
{
"category": "product_version",
"name": "libevent-0:2.1.13-1.el10_2.aarch64",
"product": {
"name": "libevent-0:2.1.13-1.el10_2.aarch64",
"product_id": "libevent-0:2.1.13-1.el10_2.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent@2.1.13-1.el10_2?arch=aarch64"
}
}
}
],
"category": "architecture",
"name": "aarch64"
},
{
"branches": [
{
"category": "product_version",
"name": "libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"product": {
"name": "libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"product_id": "libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-devel@2.1.13-1.el10_2?arch=ppc64le"
}
}
},
{
"category": "product_version",
"name": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"product": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"product_id": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debugsource@2.1.13-1.el10_2?arch=ppc64le"
}
}
},
{
"category": "product_version",
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"product": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"product_id": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debuginfo@2.1.13-1.el10_2?arch=ppc64le"
}
}
},
{
"category": "product_version",
"name": "libevent-0:2.1.13-1.el10_2.ppc64le",
"product": {
"name": "libevent-0:2.1.13-1.el10_2.ppc64le",
"product_id": "libevent-0:2.1.13-1.el10_2.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent@2.1.13-1.el10_2?arch=ppc64le"
}
}
}
],
"category": "architecture",
"name": "ppc64le"
},
{
"branches": [
{
"category": "product_version",
"name": "libevent-devel-0:2.1.13-1.el10_2.s390x",
"product": {
"name": "libevent-devel-0:2.1.13-1.el10_2.s390x",
"product_id": "libevent-devel-0:2.1.13-1.el10_2.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-devel@2.1.13-1.el10_2?arch=s390x"
}
}
},
{
"category": "product_version",
"name": "libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"product": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"product_id": "libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debugsource@2.1.13-1.el10_2?arch=s390x"
}
}
},
{
"category": "product_version",
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"product": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"product_id": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debuginfo@2.1.13-1.el10_2?arch=s390x"
}
}
},
{
"category": "product_version",
"name": "libevent-0:2.1.13-1.el10_2.s390x",
"product": {
"name": "libevent-0:2.1.13-1.el10_2.s390x",
"product_id": "libevent-0:2.1.13-1.el10_2.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent@2.1.13-1.el10_2?arch=s390x"
}
}
}
],
"category": "architecture",
"name": "s390x"
},
{
"branches": [
{
"category": "product_version",
"name": "libevent-devel-0:2.1.13-1.el10_2.x86_64",
"product": {
"name": "libevent-devel-0:2.1.13-1.el10_2.x86_64",
"product_id": "libevent-devel-0:2.1.13-1.el10_2.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-devel@2.1.13-1.el10_2?arch=x86_64"
}
}
},
{
"category": "product_version",
"name": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"product": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"product_id": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debugsource@2.1.13-1.el10_2?arch=x86_64"
}
}
},
{
"category": "product_version",
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"product": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"product_id": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-debuginfo@2.1.13-1.el10_2?arch=x86_64"
}
}
},
{
"category": "product_version",
"name": "libevent-0:2.1.13-1.el10_2.x86_64",
"product": {
"name": "libevent-0:2.1.13-1.el10_2.x86_64",
"product_id": "libevent-0:2.1.13-1.el10_2.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent@2.1.13-1.el10_2?arch=x86_64"
}
}
}
],
"category": "architecture",
"name": "x86_64"
},
{
"branches": [
{
"category": "product_version",
"name": "libevent-doc-0:2.1.13-1.el10_2.noarch",
"product": {
"name": "libevent-doc-0:2.1.13-1.el10_2.noarch",
"product_id": "libevent-doc-0:2.1.13-1.el10_2.noarch",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent-doc@2.1.13-1.el10_2?arch=noarch"
}
}
}
],
"category": "architecture",
"name": "noarch"
},
{
"branches": [
{
"category": "product_version",
"name": "libevent-0:2.1.13-1.el10_2.src",
"product": {
"name": "libevent-0:2.1.13-1.el10_2.src",
"product_id": "libevent-0:2.1.13-1.el10_2.src",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/libevent@2.1.13-1.el10_2?arch=src"
}
}
}
],
"category": "architecture",
"name": "src"
}
],
"category": "vendor",
"name": "Red Hat"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-devel-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64"
},
"product_reference": "libevent-devel-0:2.1.13-1.el10_2.aarch64",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-devel-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le"
},
"product_reference": "libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-devel-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x"
},
"product_reference": "libevent-devel-0:2.1.13-1.el10_2.s390x",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-devel-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64"
},
"product_reference": "libevent-devel-0:2.1.13-1.el10_2.x86_64",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-doc-0:2.1.13-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10)",
"product_id": "AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch"
},
"product_reference": "libevent-doc-0:2.1.13-1.el10_2.noarch",
"relates_to_product_reference": "AppStream-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64"
},
"product_reference": "libevent-0:2.1.13-1.el10_2.aarch64",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le"
},
"product_reference": "libevent-0:2.1.13-1.el10_2.ppc64le",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x"
},
"product_reference": "libevent-0:2.1.13-1.el10_2.s390x",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-0:2.1.13-1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src"
},
"product_reference": "libevent-0:2.1.13-1.el10_2.src",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64"
},
"product_reference": "libevent-0:2.1.13-1.el10_2.x86_64",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64"
},
"product_reference": "libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"relates_to_product_reference": "BaseOS-10.2.Z"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)",
"product_id": "BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
},
"product_reference": "libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"relates_to_product_reference": "BaseOS-10.2.Z"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-63379",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-08-20T18:11:26.473492+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520667"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Libevent, an event notification library. An unauthenticated remote attacker can exploit a vulnerability where chunked HTTP (Hypertext Transfer Protocol) trailers are incorrectly merged into request headers. This allows the attacker to place security-sensitive fields in trailers, causing an upstream proxy and the Libevent application to interpret different effective headers. This can lead to header smuggling, authorization bypass, proxy-header spoofing, or cache poisoning.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat ships libevent in multiple products including Red Hat Enterprise Linux, RHIVOS, and as part of RHCOS in OpenShift. All shipped versions are prior to the fix in 2.1.13 and are affected by this vulnerability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63379"
},
{
"category": "external",
"summary": "RHBZ#2520667",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520667"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63379",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63379"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63379",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63379"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/87e8e44fa774e9677b089b1a5114ee68aefa1636",
"url": "https://github.com/libevent/libevent/commit/87e8e44fa774e9677b089b1a5114ee68aefa1636"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/b847071141b3827900d536594ec9045eb0a4c485",
"url": "https://github.com/libevent/libevent/commit/b847071141b3827900d536594ec9045eb0a4c485"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-2gmv-p5m7-98p6",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-2gmv-p5m7-98p6"
}
],
"release_date": "2026-08-20T17:55:00.789000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning"
},
{
"cve": "CVE-2026-63381",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-08-20T18:02:05.183416+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520657"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Libevent, an event notification library. A use-after-free vulnerability exists in the `evbuffer_add_buffer_reference` function when it processes an output buffer with a zero length. This can lead to a dangling pointer, which an attacker could exploit to cause memory corruption or crash the application.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: Memory corruption due to use-after-free",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Enterprise Linux, OpenShift (RHCOS), RHIVOS, and community products (Fedora, Hummingbird) ship affected versions of libevent.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63381"
},
{
"category": "external",
"summary": "RHBZ#2520657",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520657"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63381",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63381"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63381",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63381"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/5cb95ba2f804f8aff46f88d58391c71e1251cd1c",
"url": "https://github.com/libevent/libevent/commit/5cb95ba2f804f8aff46f88d58391c71e1251cd1c"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/9db091b04f569be3a700fa9860ef02f90b830af9",
"url": "https://github.com/libevent/libevent/commit/9db091b04f569be3a700fa9860ef02f90b830af9"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-c2pj-cg4r-88c8",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-c2pj-cg4r-88c8"
}
],
"release_date": "2026-08-20T17:50:09.322000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libevent: Libevent: Memory corruption due to use-after-free"
},
{
"cve": "CVE-2026-63382",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-08-20T18:02:20.622823+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520660"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in libevent. The evhttp parser in libevent\u0027s http.c component inconsistently handles HTTP Transfer-Encoding headers and chunked framing. This inconsistency allows an unauthenticated remote attacker to desynchronize request boundaries when libevent is used behind a proxy. Successful exploitation could lead to request smuggling, potentially bypassing access controls or poisoning caches.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: libevent: Multiple HTTP Parser Bugs Enable Request Smuggling",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Enterprise Linux, OpenShift (RHCOS), RHIVOS, and community products (Fedora, Hummingbird) ship affected versions of libevent.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63382"
},
{
"category": "external",
"summary": "RHBZ#2520660",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520660"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63382",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63382"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63382",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63382"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/10abb34b8dc3e1184de315dd261ce4b77563cda6",
"url": "https://github.com/libevent/libevent/commit/10abb34b8dc3e1184de315dd261ce4b77563cda6"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/5119ceb00557bf007f9065709e852686f3c0bb6e",
"url": "https://github.com/libevent/libevent/commit/5119ceb00557bf007f9065709e852686f3c0bb6e"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/83ba67373032334559b82409db035dd8c3cc1660",
"url": "https://github.com/libevent/libevent/commit/83ba67373032334559b82409db035dd8c3cc1660"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/ac38703b2d312200c4f967f02936af0118d384a0",
"url": "https://github.com/libevent/libevent/commit/ac38703b2d312200c4f967f02936af0118d384a0"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-q39v-w2g7-gr8j",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-q39v-w2g7-gr8j"
}
],
"release_date": "2026-08-20T17:51:15.156000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libevent: libevent: Multiple HTTP Parser Bugs Enable Request Smuggling"
},
{
"cve": "CVE-2026-63383",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-08-20T18:01:02.048026+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520654"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Libevent, an event notification library. A remote attacker could exploit an out-of-bounds read vulnerability in the `decode_tag_internal()` function by sending specially crafted, attacker-controlled tagged RPC (Remote Procedure Call) data. This could lead to a denial of service, causing the process that decodes the data to crash.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: Denial of Service via malformed RPC data",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Important flaw in libevent can lead to a denial of service. An attacker could send specially crafted RPC data to a service utilizing libevent, causing an out-of-bounds read and crashing the application. This vulnerability primarily affects applications that process untrusted RPC data using libevent.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63383"
},
{
"category": "external",
"summary": "RHBZ#2520654",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520654"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63383",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63383"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63383",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63383"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/91ed8745eebabdd27592a83d350338a8c4626321",
"url": "https://github.com/libevent/libevent/commit/91ed8745eebabdd27592a83d350338a8c4626321"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/e1f9e21887c6b104e206a718385ba3ffc75180cb",
"url": "https://github.com/libevent/libevent/commit/e1f9e21887c6b104e206a718385ba3ffc75180cb"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6"
}
],
"release_date": "2026-08-20T17:48:24.568000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libevent: Libevent: Denial of Service via malformed RPC data"
},
{
"cve": "CVE-2026-63384",
"cwe": {
"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
},
"discovery_date": "2026-08-20T18:01:40.543023+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520658"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Libevent. An incorrect integer conversion in the `evtag_unmarshal_header` function allows a remote attacker to provide a specially crafted payload length. This can lead to a wrapped large allocation request, resulting in a denial of service (DoS) for the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header`",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw. A remote attacker can trigger a denial of service in applications utilizing Libevent\u0027s event tagging feature by sending a specially crafted payload. The incorrect integer conversion can lead to excessive memory allocation, causing resource exhaustion.\nThis issue is fixed in versions 2.1.13 and 2.2.2-alpha.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63384"
},
{
"category": "external",
"summary": "RHBZ#2520658",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520658"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63384",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63384"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63384",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63384"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/109c16499282959d70f56ec3baf4c8b1e6646bda",
"url": "https://github.com/libevent/libevent/commit/109c16499282959d70f56ec3baf4c8b1e6646bda"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/5e3c6ebe342b34c5a9bcf48e9a32ad6708b9c416",
"url": "https://github.com/libevent/libevent/commit/5e3c6ebe342b34c5a9bcf48e9a32ad6708b9c416"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8"
}
],
"release_date": "2026-08-20T17:53:08.417000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header`"
},
{
"cve": "CVE-2026-63385",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-08-20T18:11:18.605370+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520666"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in libevent. The evhttp_decode_uri_internal function in http.c decodes percent-encoded %00 bytes into literal NUL characters without rejecting them, allowing an attacker to craft a URI such as /admin/secret%00.jpg where extension-based access checks see .jpg but the server processes /admin/secret, bypassing path-based access controls. Additionally, evhttp_header_is_valid_value accepts obsolete HTTP header line folding (CRLF followed by SP/HT), which RFC 9112 states new implementations should reject, creating a header injection vector in proxy chains where the frontend rejects obs-fold but libevent accepts it. This could lead to access control bypass, header injection, or request smuggling.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: HTTP header handling bugs create risk of access control bypass.",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Enterprise Linux, OpenShift (RHCOS), RHIVOS, and community products (Fedora, Hummingbird) ship affected versions of libevent.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63385"
},
{
"category": "external",
"summary": "RHBZ#2520666",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520666"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63385",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63385"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63385",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63385"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/758be0c0f69c1934ef9a84ab39e9f9e5fde2e6d0",
"url": "https://github.com/libevent/libevent/commit/758be0c0f69c1934ef9a84ab39e9f9e5fde2e6d0"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/9170dd35e64714613e8d13b290587cfc28e258e2",
"url": "https://github.com/libevent/libevent/commit/9170dd35e64714613e8d13b290587cfc28e258e2"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-jcwh-pvf2-73p2",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-jcwh-pvf2-73p2"
}
],
"release_date": "2026-08-20T17:55:36.214000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libevent: Libevent: HTTP header handling bugs create risk of access control bypass."
},
{
"cve": "CVE-2026-63387",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-08-20T18:01:14.389593+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520655"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Libevent, an event notification library. An off-by-one stack buffer overflow exists in the `dnsname_to_labels` function when processing a name-bearing DNS record. A remote attacker could send a specially crafted DNS server response, which may lead to a crash or corruption of the process, resulting in a denial of service or potential information disclosure and integrity impact.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Important vulnerability in the libevent library\u0027s DNS parsing component can lead to a denial of service or data corruption due to an off-by-one stack buffer overflow. A remote attacker can exploit this flaw with low attack complexity by providing a specially crafted DNS server response to services utilizing libevent for DNS resolution.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63387"
},
{
"category": "external",
"summary": "RHBZ#2520655",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520655"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63387",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63387"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63387",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63387"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-58rx-7448-jw47",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-58rx-7448-jw47"
}
],
"release_date": "2026-08-20T17:53:41.863000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption"
},
{
"cve": "CVE-2026-63388",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-08-20T18:02:33.843530+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2520661"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Libevent. A heap out-of-bounds write vulnerability in the `bufferevent_socket_set_conn_address_` function allows an unauthenticated local peer to achieve arbitrary code execution. By connecting to an AF_UNIX listener, an attacker can overwrite critical heap data, leading to memory corruption and potentially full control over the affected system. This can severely impact the confidentiality, integrity, and availability of data and services.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important vulnerability in libevent that allows an unauthenticated local attacker to achieve arbitrary code execution. By connecting to an AF_UNIX listener, an attacker can trigger a heap out-of-bounds write, leading to memory corruption and high impact on system confidentiality, integrity, and availability. The local attack vector limits the immediate threat, but the unauthenticated nature and severe consequences elevate its importance.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63388"
},
{
"category": "external",
"summary": "RHBZ#2520661",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520661"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-63388",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63388"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63388",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63388"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/52057cb33d0c20c0a0453fbabe6c0c96854931b9",
"url": "https://github.com/libevent/libevent/commit/52057cb33d0c20c0a0453fbabe6c0c96854931b9"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/commit/ef38f926e9cd1f082416c6fff13587bc1f431d72",
"url": "https://github.com/libevent/libevent/commit/ef38f926e9cd1f082416c6fff13587bc1f431d72"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
},
{
"category": "external",
"summary": "https://github.com/libevent/libevent/security/advisories/GHSA-cvq5-vrvr-j338",
"url": "https://github.com/libevent/libevent/security/advisories/GHSA-cvq5-vrvr-j338"
}
],
"release_date": "2026-08-20T17:44:18.435000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-16T12:36:40+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:67909"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.aarch64",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.ppc64le",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.s390x",
"AppStream-10.2.Z:libevent-devel-0:2.1.13-1.el10_2.x86_64",
"AppStream-10.2.Z:libevent-doc-0:2.1.13-1.el10_2.noarch",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.src",
"BaseOS-10.2.Z:libevent-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debuginfo-0:2.1.13-1.el10_2.x86_64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.aarch64",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.ppc64le",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.s390x",
"BaseOS-10.2.Z:libevent-debugsource-0:2.1.13-1.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling"
}
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…