CVE-2025-9179
CRITICAL severity · CVSS 9.8 · Memory corruption
9.8CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2025-64/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-65/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-66/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-67/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-70/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-71/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-72/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979527