Uncontrolled Recursion Affecting libxml2-debuginfo package, versions <0:2.9.1-6.amzn2.5.23


Severity

Recommended
0.0
low
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-AMZN2-LIBXML2DEBUGINFO-15245180
  • published6 Feb 2026
  • disclosed15 Jan 2026

Introduced: 15 Jan 2026

CVE-2026-0989  (opens in a new tab)
CWE-674  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libxml2-debuginfo to version 0:2.9.1-6.amzn2.5.23 or higher.
This issue was patched in ALAS2-2026-3145.

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.

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.

CVSS Base Scores

version 3.1