Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://www.mozilla.org/security/advisories/mfsa2025-87/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-88/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-89/ Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · mozillaNVD modified 2026-10-18 21:10
Affected (CPE criteria) 2
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
References 6
- https://bugzilla.mozilla.org/show_bug.cgi?id=1994241 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-87/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-88/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-89/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-90/
- https://www.mozilla.org/security/advisories/mfsa2025-91/