Description
Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. 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 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
References (6)
Core 6
Core References
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-28/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-29/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-31/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-32/
Scores
CVSS v3
8.1
EPSS
0.0044
EPSS Percentile
63.2%
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-119
Status
published
Products (8)
mozilla/firefox
< 128.10
mozilla/firefox
< 138.0
Mozilla/Firefox
128.10 - 128.*
Mozilla/Firefox
138
mozilla/thunderbird
< 128.10.0
mozilla/thunderbird
< 138.0
Mozilla/Thunderbird
128.10 - 128.*
Mozilla/Thunderbird
138
Published
Apr 29, 2025
Tracked Since
Feb 18, 2026