| Name | CVE-2025-9181 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4277-1, DLA-4279-1, DSA-5980-1, DSA-5984-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 143.0.3-1 | fixed |
| firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | vulnerable |
| bullseye (security) | 140.3.1esr-1~deb11u1 | fixed | |
| bookworm | 128.14.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 140.3.1esr-1~deb12u1 | fixed | |
| trixie | 128.14.0esr-1~deb13u1 | fixed | |
| trixie (security) | 140.3.1esr-1~deb13u1 | fixed | |
| forky, sid | 140.3.1esr-2 | fixed | |
| thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | vulnerable |
| bullseye (security) | 1:140.3.0esr-1~deb11u1 | fixed | |
| bookworm | 1:128.14.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 1:140.3.0esr-1~deb12u1 | fixed | |
| trixie | 1:128.14.0esr-1~deb13u1 | fixed | |
| trixie (security) | 1:140.3.0esr-1~deb13u1 | fixed | |
| forky | 1:140.3.0esr-1 | fixed | |
| sid | 1:140.3.1esr-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| firefox | source | (unstable) | 142.0-1 | |||
| firefox-esr | source | bullseye | 128.14.0esr-1~deb11u1 | DLA-4277-1 | ||
| firefox-esr | source | bookworm | 128.14.0esr-1~deb12u1 | DSA-5980-1 | ||
| firefox-esr | source | trixie | 128.14.0esr-1~deb13u1 | DSA-5980-1 | ||
| firefox-esr | source | (unstable) | 128.14.0esr-1 | |||
| thunderbird | source | bullseye | 1:128.14.0esr-1~deb11u1 | DLA-4279-1 | ||
| thunderbird | source | bookworm | 1:128.14.0esr-1~deb12u1 | DSA-5984-1 | ||
| thunderbird | source | trixie | 1:128.14.0esr-1~deb13u1 | DSA-5984-1 | ||
| thunderbird | source | (unstable) | 1:128.14.0esr-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2025-66/#CVE-2025-9181
https://www.mozilla.org/en-US/security/advisories/mfsa2025-64/#CVE-2025-9181
https://www.mozilla.org/en-US/security/advisories/mfsa2025-71/#CVE-2025-9181