CVE-2025-9179

EUVD-2025-25246
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 affects Firefox < 142, Firefox ESR < 115.27, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA-ADPADP
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 29%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 115.27.0
mozillafirefox
𝑥
< 142.0
mozillafirefox
128.0 ≤
𝑥
< 128.14.0
mozillafirefox
140.0 ≤
𝑥
< 140.2.0
mozillathunderbird
𝑥
< 128.14.0
mozillathunderbird
𝑥
< 142.0
mozillathunderbird
140.0 ≤
𝑥
< 140.2.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
147.0.4-1
fixed
firefox-esr
bookworm
128.14.0esr-1~deb12u1
fixed
bookworm (security)
140.7.0esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
140.7.0esr-1~deb11u1
fixed
forky
140.7.0esr-1
fixed
sid
140.7.0esr-1
fixed
trixie
140.4.0esr-1~deb13u1
fixed
trixie (security)
140.7.0esr-1~deb13u1
fixed
thunderbird
bookworm
1:140.6.0esr-1~deb12u1
fixed
bookworm (security)
1:140.7.1esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
1:140.7.1esr-1~deb11u1
fixed
forky
1:140.7.1esr-1
fixed
sid
1:140.7.1esr-1
fixed
trixie
1:140.6.0esr-1~deb13u1
fixed
trixie (security)
1:140.7.1esr-1~deb13u1
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1979527
https://www.mozilla.org/security/advisories/mfsa2025-64/
https://www.mozilla.org/security/advisories/mfsa2025-65/
https://www.mozilla.org/security/advisories/mfsa2025-66/
https://www.mozilla.org/security/advisories/mfsa2025-67/
https://www.mozilla.org/security/advisories/mfsa2025-70/
https://www.mozilla.org/security/advisories/mfsa2025-71/
https://www.mozilla.org/security/advisories/mfsa2025-72/
https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html