CVEvulnerability
CVE-2025-6424
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2025-06-24
- Last modified
- 2026-10-23
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
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.
Affected configurations
• mozilla firefox (< 115.25.0)
• mozilla firefox (< 140.0)
• mozilla firefox (>= 116.0 < 128.12.0)
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1966423 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-51/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-52/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-53/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-54/ www.mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2025-55/ www.mozilla.org
- https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html lists.debian.org