Description
Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. 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 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.
References (6)
Core 6
Core References
Broken Link, Issue Tracking
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1850615%2C1932468%2C1942551%2C1951017%2C1951494
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-20/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-22/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-23/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-24/
Scores
CVSS v3
8.1
EPSS
0.0024
EPSS Percentile
46.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-416
Status
published
Products (7)
mozilla/firefox
< 128.8.0
mozilla/firefox
< 136.0
Mozilla/Firefox
128.9 - 128.*
Mozilla/Firefox
137
mozilla/thunderbird
< 128.8.0
Mozilla/Thunderbird
128.9 - 128.*
Mozilla/Thunderbird
137
Published
Apr 01, 2025
Tracked Since
Feb 18, 2026