RHSA-2025:10630HighCVSS 9.1

Red Hat Security Advisory: libxml2 security update

Published
July 8, 2025
Last Modified
August 17, 2026

🔗 CVE IDs covered (4)

CVE-2025-6021 →CVE-2025-49794 →CVE-2025-49795 →CVE-2025-49796 →

📋 Description

CVE-2025-6021 — libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 CVE-2025-49794 — libxml: Heap use after free (UAF) leads to Denial of service (DoS) CVE-2025-49795 — libxml: Null pointer dereference leads to Denial of service (DoS) CVE-2025-49796 — libxml: Type confusion leads to Denial of service (DoS)

🎯 Affected products56

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-0:2.12.5-7.el10_0.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-0:2.12.5-7.el10_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debuginfo-0:2.12.5-7.el10_0.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libxml2-debugsource-0:2.12.5-7.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • +26 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Users are strongly advised to apply vendor-supplied patches as soon as they become available to address the underlying integer overflow flaw in the affected code. Workaround: There's no available mitigation other than avoid processing untrusted XML documents before updating to the libxml version containing the fix. Workaround: Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability. Workaround: There's no available mitigation other than to avoid processing untrusted XML documents if the user is unable/unwilling to update the library.

🔗 References (7)