CVE-2025-9181

EUVD-2025-25244
Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
mozillafirefox_esr
𝑥
< 128.14.0
mozillafirefox
𝑥
< 142.0
mozillafirefox_esr
140.0 ≤
𝑥
< 140.2.0
mozillathunderbird_esr
𝑥
< 128.14.0
mozillathunderbird
𝑥
< 142.0
mozillathunderbird_esr
140.0 ≤
𝑥
< 140.2.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
149.0-1
fixed
firefox-esr
bookworm
128.14.0esr-1~deb12u1
fixed
bookworm (security)
140.9.0esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
140.9.0esr-1~deb11u1
fixed
forky
140.9.0esr-1
fixed
sid
140.9.0esr-1
fixed
trixie
140.8.0esr-1~deb13u1
fixed
trixie (security)
140.9.0esr-1~deb13u1
fixed
thunderbird
bookworm
1:140.6.0esr-1~deb12u1
fixed
bookworm (security)
1:140.9.0esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
1:140.9.0esr-1~deb11u1
fixed
forky
1:140.9.0esr-1
fixed
sid
1:140.9.0esr-1
fixed
trixie
1:140.8.0esr-1~deb13u1
fixed
trixie (security)
1:140.9.0esr-1~deb13u1
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1977130
https://www.mozilla.org/security/advisories/mfsa2025-64/
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