RLSA-2026:71585 (CVE-2026-74860)

Vulnerability from osv_rocky – Published: 2026-09-25 18:04 – Updated: 2026-09-26 00:15 – Source website
VLAI
Summary
Important: libxml2 security update
Details

The libxml2 library is a development toolbox providing the implementation of various XML standards.

Security Fix(es):

  • libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)

  • libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)

  • libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)

  • libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)

  • libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)

  • libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:9",
        "name": "libxml2",
        "purl": "pkg:rpm/rocky-linux/libxml2?distro=rocky-linux-9\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:2.9.13-14.el9_8.5"
            }
          ],
          "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-2026:71585"
  },
  "details": "The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)\n\n* libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)\n\n* libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)\n\n* libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n\n* libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)\n\n* libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)\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-2026:71585",
  "modified": "2026-09-26T00:15:00.896856Z",
  "published": "2026-09-25T18:04:58.698983Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:71585"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528986"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528987"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528989"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528990"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528992"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529697"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:71585"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: libxml2 security update",
  "upstream": [
    "CVE-2026-74860",
    "CVE-2026-86138",
    "CVE-2026-86140",
    "CVE-2026-86142",
    "CVE-2026-86143",
    "CVE-2026-86144"
  ]
}



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