VULNERABILITY INTELLIGENCE

CVE-2025-6424

CVSS score9.8 CRITICAL
EPSS probability7.96%
CISA KEVNot currently listed
Published2025-06-24
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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

Weakness classification

  • CWE-416: Use After Free

Primary references