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rlsa-2026:67910
Vulnerability from osv_rocky
Published
2026-09-17 06:06
Modified
2026-09-17 06:13
Summary
Important: libevent security update
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.

Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Credits
Rocky Enterprise Software Foundation
Red Hat
References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:9",
        "name": "libevent",
        "purl": "pkg:rpm/rocky-linux/libevent?distro=rocky-linux-9\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:2.1.13-1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:67910"
  },
  "details": "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.",
  "id": "RLSA-2026:67910",
  "modified": "2026-09-17T06:13:41.947454Z",
  "published": "2026-09-17T06:06:39.358579Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:67910"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520654"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520655"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520657"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520658"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520660"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520661"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520666"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520667"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:67910"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: libevent security update",
  "upstream": [
    "CVE-2026-63379",
    "CVE-2026-63381",
    "CVE-2026-63382",
    "CVE-2026-63383",
    "CVE-2026-63384",
    "CVE-2026-63385",
    "CVE-2026-63387",
    "CVE-2026-63388"
  ]
}



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