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Memory safety bugs present in Firefox 140 and Thunderbird 140. 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 < 141 and Thunderbird < 141.
Reserved 2025-07-22 | Published 2025-07-22 | Updated 2025-07-22 | Assigner mozillaMemory safety bugs fixed in Firefox 141 and Thunderbird 141
Akmat Suleimanov, Andrew McCreight
bugzilla.mozilla.org/buglist.cgi?bug_id=1933572%2C1971116 (Memory safety bugs fixed in Firefox 141 and Thunderbird 141)
www.mozilla.org/security/advisories/mfsa2025-56/
www.mozilla.org/security/advisories/mfsa2025-61/
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