Description
Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
Product status
149.0.2 (rpm)
149.0.2 (rpm)
Credits
Brian Grinstead, Christian Holler, Tom Schuster and the Mozilla Fuzzing Team
References
bugzilla.mozilla.org/...025422%2C2025468%2C2025492%2C2025505 (Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2)
www.mozilla.org/security/advisories/mfsa2026-25/
www.mozilla.org/security/advisories/mfsa2026-27/
www.mozilla.org/security/advisories/mfsa2026-28/
www.mozilla.org/security/advisories/mfsa2026-29/