Allocation of Resources Without Limits or Throttling Affecting expat package, versions <0:2.6.3-1.amzn2023.0.3


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.08% (24th percentile)

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  • Snyk IDSNYK-AMZN2023-EXPAT-13166785
  • published1 Oct 2025
  • disclosed15 Sept 2025

Introduced: 15 Sep 2025

NewCVE-2025-59375  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 expat to version 0:2.6.3-1.amzn2023.0.3 or higher.
This issue was patched in ALAS2023-2025-1196.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

CVSS Base Scores

version 3.1