RHSA-2026:54509

Vulnerability from csaf_opensuse - Published: 2026-08-13 11:10 - Updated: 2026-09-23 17:43
Summary
Red Hat Security Advisory: bind9.16 security update
Severity
Important
Notes
Topic: An update for bind9.16 is now available for Red Hat Enterprise Linux 8. 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 Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly. Security Fix(es): * bind9: bind: Potential wildcard CNAME RPZ policy bypass (CVE-2026-11331) * bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field (CVE-2026-13321) * bind: bind9: Potential memory usage beyond configured limits (CVE-2026-11622) * bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards (CVE-2026-11721) * bind: bind9: Unexpected exit with NSEC and NSEC3 both present (CVE-2026-13204) * bind: bind9: Incorrect acceptance of NSEC3 records (CVE-2026-10723) 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.

BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses.

CWE-345 - Insufficient Verification of Data Authenticity
Affected products
Product Identifier Version Remediation
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-32:9.16.23-0.22.el8_10.12.src —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-chroot-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-chroot-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-chroot-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-chroot-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-license-32:9.16.23-0.22.el8_10.12.noarch —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-8.10.0.Z.MAIN.EUS:python3-bind9.16-32:9.16.23-0.22.el8_10.12.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-debugsource-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-devel-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-devel-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-devel-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-devel-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-devel-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-dnssec-utils-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-doc-32:9.16.23-0.22.el8_10.12.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-libs-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-libs-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.aarch64 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.i686 —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.ppc64le —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.s390x —
Vendor Fix fix
Unresolved product id: CRB-8.10.0.Z.MAIN.EUS:bind9.16-utils-debuginfo-32:9.16.23-0.22.el8_10.12.x86_64 —
Vendor Fix fix
Threats
Impact Moderate

A flaw was found in BIND 9, a widely used Domain Name System (DNS) software. A remote attacker could exploit this by sending specially crafted, excessively long DNS queries. This could bypass Response Policy Zone (RPZ) rules, which are designed to block access to malicious domains, and potentially cause the BIND 9 software to crash, leading to a denial of service.

CWE-20 - Improper Input Validation
Affected products
Fixed 75 products, the same list as for CVE-2026-10723
Threats
Impact Important

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the max-cache-size parameter

CWE-400 - Uncontrolled Resource Consumption
Affected products
Fixed 75 products, the same list as for CVE-2026-10723
Threats
Impact Important

It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes named to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set synth-from-dnssec yes; (which is the default).

CWE-345 - Insufficient Verification of Data Authenticity
Affected products
Fixed 75 products, the same list as for CVE-2026-10723
Threats
Impact Important

If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof.

CWE-617 - Reachable Assertion
Affected products
Fixed 75 products, the same list as for CVE-2026-10723
Threats
Impact Important

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone.

CWE-345 - Insufficient Verification of Data Authenticity
Affected products
Fixed 75 products, the same list as for CVE-2026-10723
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:54509 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2503721 external
https://bugzilla.redhat.com/show_bug.cgi?id=2504166 external
https://bugzilla.redhat.com/show_bug.cgi?id=2504298 external
https://bugzilla.redhat.com/show_bug.cgi?id=2504338 external
https://bugzilla.redhat.com/show_bug.cgi?id=2504447 external
https://bugzilla.redhat.com/show_bug.cgi?id=2504560 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-10723 self
https://bugzilla.redhat.com/show_bug.cgi?id=2504560 external
https://www.cve.org/CVERecord?id=CVE-2026-10723 external
https://nvd.nist.gov/vuln/detail/CVE-2026-10723 external
https://access.redhat.com/security/cve/CVE-2026-11331 self
https://bugzilla.redhat.com/show_bug.cgi?id=2503721 external
https://www.cve.org/CVERecord?id=CVE-2026-11331 external
https://nvd.nist.gov/vuln/detail/CVE-2026-11331 external
https://access.redhat.com/security/cve/CVE-2026-11622 self
https://bugzilla.redhat.com/show_bug.cgi?id=2504298 external
https://www.cve.org/CVERecord?id=CVE-2026-11622 external
https://nvd.nist.gov/vuln/detail/CVE-2026-11622 external
https://access.redhat.com/security/cve/CVE-2026-11721 self
https://bugzilla.redhat.com/show_bug.cgi?id=2504338 external
https://www.cve.org/CVERecord?id=CVE-2026-11721 external
https://nvd.nist.gov/vuln/detail/CVE-2026-11721 external
https://access.redhat.com/security/cve/CVE-2026-13204 self
https://bugzilla.redhat.com/show_bug.cgi?id=2504447 external
https://www.cve.org/CVERecord?id=CVE-2026-13204 external
https://nvd.nist.gov/vuln/detail/CVE-2026-13204 external
https://access.redhat.com/security/cve/CVE-2026-13321 self
https://bugzilla.redhat.com/show_bug.cgi?id=2504166 external
https://www.cve.org/CVERecord?id=CVE-2026-13321 external
https://nvd.nist.gov/vuln/detail/CVE-2026-13321 external

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          "title": "Vulnerability description"
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          "text": "This Moderate flaw in BIND allows an attacker to forge authenticated NXDOMAIN responses for sibling zones due to incorrect validation of child-zone NSEC3 records. Exploitation requires high attack complexity, limiting the immediate risk to Red Hat products.",
          "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.",
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-10723"
        },
        {
          "category": "external",
          "summary": "RHBZ#2504560",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2504560"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-10723",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-10723"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-10723",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10723"
        }
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      "release_date": "2026-07-22T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-08-13T11:10:24+00:00",
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          "category": "impact",
          "details": "Moderate"
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      "title": "bind: bind9: Incorrect acceptance of NSEC3 records"
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    {
      "cve": "CVE-2026-11331",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "discovery_date": "2026-07-21T16:15:37.317000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2503721"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in BIND 9, a widely used Domain Name System (DNS) software. A remote attacker could exploit this by sending specially crafted, excessively long DNS queries. This could bypass Response Policy Zone (RPZ) rules, which are designed to block access to malicious domains, and potentially cause the BIND 9 software to crash, leading to a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind9: bind: Potential wildcard CNAME RPZ policy bypass",
          "title": "Vulnerability summary"
        },
        {
          "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"
        }
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            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
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      "ids": [
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          "text": "2504298"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the max-cache-size parameter",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: bind9: Potential memory usage beyond configured limits",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Important flaw in BIND\u0027s DNSSEC-validating resolver can lead to a denial of service. An attacker can trigger excessive memory usage by performing a random subdomain attack against a DNSSEC-signed zone, causing the resolver to exceed its `max-cache-size` limits. This is critical for Red Hat deployments where BIND is configured for DNSSEC validation and exposed to untrusted query sources.",
          "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"
        }
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-11622"
        },
        {
          "category": "external",
          "summary": "RHBZ#2504298",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2504298"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-11622",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-11622"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-11622",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11622"
        }
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      "release_date": "2026-07-22T00:00:00+00:00",
      "remediations": [
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          "date": "2026-08-13T11:10:24+00:00",
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            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "bind: bind9: Potential memory usage beyond configured limits"
    },
    {
      "cve": "CVE-2026-11721",
      "cwe": {
        "id": "CWE-345",
        "name": "Insufficient Verification of Data Authenticity"
      },
      "discovery_date": "2026-07-21T20:22:21.905000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2504338"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "It is possible for an attacker\u0027s zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes named to produce a wildcard name for a zone that is shorter than the attacker\u0027s zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set synth-from-dnssec yes; (which is the default).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards",
          "title": "Vulnerability summary"
        },
        {
          "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"
        }
      ],
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-11721",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11721"
        }
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      "release_date": "2026-07-22T00:00:00+00:00",
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            "integrityImpact": "HIGH",
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          "category": "impact",
          "details": "Important"
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      "title": "bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards"
    },
    {
      "cve": "CVE-2026-13204",
      "cwe": {
        "id": "CWE-617",
        "name": "Reachable Assertion"
      },
      "discovery_date": "2026-07-21T20:41:55.541000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2504447"
        }
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      "notes": [
        {
          "category": "description",
          "text": "If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: bind9: Unexpected exit with NSEC and NSEC3 both present",
          "title": "Vulnerability summary"
        },
        {
          "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"
        }
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          "date": "2026-08-13T11:10:24+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",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "cwe": {
        "id": "CWE-345",
        "name": "Insufficient Verification of Data Authenticity"
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      "ids": [
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          "text": "2504166"
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          "category": "description",
          "text": "The BIND resolver accepts validly-signed NSEC records where the \"Next Domain Name\" field points outside the signer\u0027s zone.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "An attacker controlling any DNSSEC-signed zone can craft NSEC records that span into victim zones, enabling cross-zone cache poisoning with authenticated denial-of-service responses (AD=1).",
          "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"
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-13321"
        },
        {
          "category": "external",
          "summary": "RHBZ#2504166",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2504166"
        },
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-13321",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-13321"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-13321",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13321"
        }
      ],
      "release_date": "2026-07-22T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-08-13T11:10:24+00:00",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field"
    }
  ]
}



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