Vulnerability Description
An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 115.27.0 |
| Mozilla | Thunderbird | < 128.14.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979527Issue TrackingPermissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-64/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-65/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-66/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-67/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-70/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-71/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-72/Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
- https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html
FAQ
What is CVE-2025-9179?
CVE-2025-9179 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the cont...
How severe is CVE-2025-9179?
CVE-2025-9179 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-9179?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Thunderbird.