Heap-based Buffer Overflow Affecting libxml2 package, versions <0:2.9.7-21.el8_10.10


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.16% (5th percentile)

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  • Snyk IDSNYK-ORACLE8-LIBXML2-20883388
  • published13 Oct 2026
  • disclosed5 Sept 2026

Introduced: 5 Sep 2026

CVE-2026-86142  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Oracle:8 libxml2 to version 0:2.9.7-21.el8_10.10 or higher.
This issue was patched in ELSA-2026-80675.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.

CVSS Base Scores

version 3.1