Buffer Access with Incorrect Length Value The advisory has been revoked - it doesn't affect any version of package python3-libxml2 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PYTHON3LIBXML2-19651114
- published9 Sept 2026
- disclosed5 Sept 2026
Introduced: 5 Sep 2026
CVE-2026-86142 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3-libxml2 package and not the python3-libxml2 package as distributed by RHEL.
In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2528990
- https://access.redhat.com/security/cve/CVE-2026-86142
- https://access.redhat.com/errata/RHSA-2026:64463
- https://access.redhat.com/errata/RHSA-2026:71586
- https://access.redhat.com/errata/RHSA-2026:89759
- https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58
- https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4
- https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1113