Description
It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
128.8 to ≤ 128.*unaffected136 to ≤ *unaffected
Mozilla Thunderbird
128.8 to ≤ 128.*unaffected136 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1942881 ↗
- https://www.mozilla.org/security/advisories/mfsa2025-14/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-16/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-17/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-18/ ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html ↗