Description
Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.
Product status
Credits
Andrew McCreight and the Mozilla Fuzzing Team
References
bugzilla.mozilla.org/...981280%2C1981283%2C1984505%2C1985067 (Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143)
www.mozilla.org/security/advisories/mfsa2025-73/
www.mozilla.org/security/advisories/mfsa2025-75/
www.mozilla.org/security/advisories/mfsa2025-77/
www.mozilla.org/security/advisories/mfsa2025-78/
