Skip to content
OpenAdvisories
Medium ALSA-2026:61248 1 CVE

Moderate: libxml2 security update

Published Aug 31, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

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

Security Fix(es):

* libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)

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.

Fixed packages 3

ReleasePackageFixed in
AlmaLinux · 8 libxml2 2.9.7-21.el8_10.7
AlmaLinux · 8 libxml2-devel 2.9.7-21.el8_10.7
AlmaLinux · 8 python3-libxml2 2.9.7-21.el8_10.7

Vulnerabilities 1

  • Low 1.8
    CVE-2026-11979

    Stack-Based Buffer Overflow in libxml2

    libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking. By supplying an overly long inp…

    xmlsoft libxml2 libxml2 libxml2 Debian Ubuntu

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-11979
  • report
    https://bugzilla.redhat.com/2494191
  • advisory
    https://errata.almalinux.org/8/ALSA-2026-61248.html