Buffer overflow in Mozilla Firefox
CVE-2025-11709
A compromised web process was able to trigger out of bounds reads and writes in a more privileged process using manipulated WebGL textures. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Mozilla Firefox — versions 115.29, 140.4, 144
- Mozilla Thunderbird — versions 140.4, 144
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2025-81/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-82/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-83/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-84/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-85/ (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-11709?
- CVE-2025-11709 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-10-14.
- How severe is CVE-2025-11709?
- Critical severity. CVSS v3 base score is 9.8 out of 10.