ALSA-2026:71586 (CVE-2026-74860)

Vulnerability from osv_almalinux – Published: 2026-09-24 00:00 – Updated: 2026-09-25 13:22 – 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.

References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libxml2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.12.5-10.el10_2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libxml2-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.12.5-10.el10_2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "libxml2-static"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.12.5-10.el10_2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "python3-libxml2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.12.5-10.el10_2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "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  * libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)\n  * libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)\n  * libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n  * libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)\n  * libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)\n\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.\n",
  "id": "ALSA-2026:71586",
  "modified": "2026-09-25T13:22:57Z",
  "published": "2026-09-24T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:71586"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-74860"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-86138"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-86140"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-86142"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-86143"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-86144"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2528986"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2528987"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2528989"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2528990"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2528992"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2529697"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-71586.html"
    }
  ],
  "related": [
    "CVE-2026-74860",
    "CVE-2026-86138",
    "CVE-2026-86140",
    "CVE-2026-86142",
    "CVE-2026-86143",
    "CVE-2026-86144"
  ],
  "schema_version": "1.7.0",
  "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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