CVE-2025-1020

CRITICAL9.8

Memory safety bugs fixed in Firefox 135 and Thunderbird 135

Published Feb 4, 2025

Modified 5 months ago

Details

Memory safety bugs present in Firefox 134 and Thunderbird 134. 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 135 and Thunderbird 135.

References

WEB

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1939063%2C1942169

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2025-1020

WEB

https://www.mozilla.org/security/advisories/mfsa2025-07/

WEB

https://www.mozilla.org/security/advisories/mfsa2025-11/

CVSS Analysis

CVSS v3.1

9.8