Out-of-bounds Read Affecting libxml2-debuginfo package, versions <0:2.9.1-6.amzn2.5.27


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.2% (9th percentile)

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  • Snyk IDSNYK-AMZN2-LIBXML2DEBUGINFO-20244924
  • published29 Sept 2026
  • disclosed5 Sept 2026

Introduced: 5 Sep 2026

CVE-2026-86137  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libxml2-debuginfo to version 0:2.9.1-6.amzn2.5.27 or higher.
This issue was patched in ALAS2-2026-3940.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2-debuginfo package and not the libxml2-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.

CVSS Base Scores

version 3.1