Uncontrolled Recursion Affecting libxml2-debugsource package, versions <0:2.10.4-1.amzn2023.0.17


Severity

Recommended
0.0
low
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.02% (6th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Uncontrolled Recursion vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-AMZN2023-LIBXML2DEBUGSOURCE-15245557
  • 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:2023 libxml2-debugsource to version 0:2.10.4-1.amzn2023.0.17 or higher.
This issue was patched in ALAS2023-2026-1397.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2-debugsource package and not the libxml2-debugsource package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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