Use After Free Affecting firefox-debugsource package, versions <0:128.12.0-1.amzn2023.0.1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.1% (29th percentile)

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  • Snyk IDSNYK-AMZN2023-FIREFOXDEBUGSOURCE-10694713
  • published11 Jul 2025
  • disclosed24 Jun 2025

Introduced: 24 Jun 2025

CVE-2025-6424  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 firefox-debugsource to version 0:128.12.0-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2025-1055.

NVD Description

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

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

CVSS Base Scores

version 3.1