CVE-2025-6436

Name
CVE-2025-6436
Description
Memory safety bugs present in Firefox 139 and Thunderbird 139. 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 < 140 and Thunderbird < 140.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security@mozilla.org https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764
security@mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-51/
security@mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-54/
security@mozilla.org https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764%2C1942930

Match rules

CPE URI Source package Min version Max version
firefox >= unspecified < 140
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* firefox >= None < 140.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
firefox edge-community 133.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 134.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 134.0.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 134.0.1-r1 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 135.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 135.0.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 136.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 136.0.2-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 136.0.3-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 136.0.4-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 137.0.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 138.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 138.0-r1 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 138.0.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 138.0.3-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 138.0.4-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 139.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 139.0-r1 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox edge-community 139.0.4-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
firefox 3.22-community 136.0.4-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable