Description
Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Mozilla / Firefox140.12 – 140.*
- Mozilla / Firefox152 – *
- Mozilla / Thunderbird140.12 – 140.*
- Mozilla / Thunderbird152 – *
References
- MISChttps://bugzilla.mozilla.org/buglist.cgi?bug_id=2011842%2C2023902%2C2025512%2C2027312%2C2029444%2C2036571%2C2036900%2C2036936%2C2037995%2C2038551%2C2040717%2C2042724
- VENDOR_ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-57/
- VENDOR_ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-58/
- VENDOR_ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-60/
- VENDOR_ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-61/