Use After Free Affecting python39:3.9/python39-devel package, versions <0:3.9.25-2.module+el8.10.0+23718+1842ae33


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.23% (13th percentile)

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  • Snyk IDSNYK-RHEL8-PYTHON39-10652995
  • published7 Jul 2025
  • disclosed15 May 2025

Introduced: 15 May 2025

CVE-2025-4516  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 python39:3.9/python39-devel to version 0:3.9.25-2.module+el8.10.0+23718+1842ae33 or higher.
This issue was patched in RHSA-2025:23530.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python39:3.9/python39-devel package and not the python39:3.9/python39-devel package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

There is an issue in CPython when using bytes.decode(&#34;unicode_escape&#34;, error=&#34;ignore|replace&#34;). If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.

CVSS Base Scores

version 3.1