Use After Free Affecting libxml2 package, versions <0:2.9.7-13.el8_6.24


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.36% (29th percentile)

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  • Snyk IDSNYK-RHEL8-LIBXML2-21900278
  • published30 Oct 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-6653  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 libxml2 to version 0:2.9.7-13.el8_6.24 or higher.
This issue was patched in RHSA-2026:92589.

NVD Description

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

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

CVSS Base Scores

version 3.1