Use After Free Affecting firefox package, versions <146.0-1


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.6% (47th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOX-14267872
  • published10 Dec 2025
  • disclosed9 Dec 2025

Introduced: 9 Dec 2025

CVE-2025-14321  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox to version 146.0-1 or higher.

NVD Description

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

Use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CVSS Base Scores

version 3.1