Description
An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
115.20 to ≤ 115.*unaffected128.7 to ≤ 128.*unaffected135 to ≤ *unaffected
Mozilla Thunderbird
128.7 to ≤ 128.*unaffected135 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1936982 ↗
- https://www.mozilla.org/security/advisories/mfsa2025-07/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-08/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-09/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-10/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-11/ ↗
- https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html ↗
- https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html ↗