RHSA-2026:98468: Important: libxml2 security update

Published Nov 11, 2026
·
Updated

The libxml2 library is a development toolbox providing the implementation of various XML standards.Security Fix(es): libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free (CVE-2026-6653) libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979) 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.

Affected Software

24 affected componentsFixes available
redhat/libxml2<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-debuginfo<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-debuginfo<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-debugsource<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-debugsource<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-devel<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-devel<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/python3-libxml2<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/python3-libxml2-debuginfo<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/python3-libxml2-debuginfo<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/python3-libxml2<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-debuginfo<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-debugsource<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2-devel<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/python3-libxml2<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/python3-libxml2-debuginfo<2.9.13-18.el9_9.1
2.9.13-18.el9_9.1
redhat/libxml2<2.9.13-18.el9_9.1.aa
2.9.13-18.el9_9.1.aa
redhat/libxml2-debuginfo<2.9.13-18.el9_9.1.aa
2.9.13-18.el9_9.1.aa
redhat/libxml2-debugsource<2.9.13-18.el9_9.1.aa
2.9.13-18.el9_9.1.aa
redhat/libxml2-devel<2.9.13-18.el9_9.1.aa
2.9.13-18.el9_9.1.aa
redhat/python3-libxml2<2.9.13-18.el9_9.1.aa
2.9.13-18.el9_9.1.aa
redhat/python3-libxml2-debuginfo<2.9.13-18.el9_9.1.aa
2.9.13-18.el9_9.1.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1
  2. Upgrade

    Upgrade redhat/libxml2-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1
  3. Upgrade

    Upgrade redhat/libxml2-debugsource to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1
  4. Upgrade

    Upgrade redhat/libxml2-devel to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1
  5. Upgrade

    Upgrade redhat/python3-libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1
  6. Upgrade

    Upgrade redhat/python3-libxml2-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1
  7. Upgrade

    Upgrade redhat/libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1.aa
  8. Upgrade

    Upgrade redhat/libxml2-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1.aa
  9. Upgrade

    Upgrade redhat/libxml2-debugsource to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1.aa
  10. Upgrade

    Upgrade redhat/libxml2-devel to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1.aa
  11. Upgrade

    Upgrade redhat/python3-libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1.aa
  12. Upgrade

    Upgrade redhat/python3-libxml2-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.9.13-18.el9_9.1.aa

Event History

Nov 11, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Company

Resources

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