| Name | CVE-2025-4918 |
| Description | An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4172-1, DLA-4194-1, DSA-5922-1, DSA-5932-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 139.0.4-1 | fixed |
| firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | vulnerable |
| bullseye (security) | 128.11.0esr-1~deb11u1 | fixed | |
| bookworm | 128.10.0esr-1~deb12u1 | vulnerable | |
| bookworm (security) | 128.11.0esr-1~deb12u1 | fixed | |
| sid, trixie | 128.11.0esr-1 | fixed | |
| thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | vulnerable |
| bullseye (security) | 1:128.11.0esr-1~deb11u1 | fixed | |
| bookworm | 1:128.10.0esr-1~deb12u1 | vulnerable | |
| bookworm (security) | 1:128.11.0esr-1~deb12u1 | fixed | |
| sid, trixie | 1:128.11.0esr-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) | 138.0.4-1 | |||
| firefox-esr | source | bullseye | 128.10.1esr-1~deb11u1 | DLA-4172-1 | ||
| firefox-esr | source | bookworm | 128.10.1esr-1~deb12u1 | DSA-5922-1 | ||
| firefox-esr | source | (unstable) | 128.10.1esr-1 | |||
| thunderbird | source | bullseye | 1:128.11.0esr-1~deb11u1 | DLA-4194-1 | ||
| thunderbird | source | bookworm | 1:128.11.0esr-1~deb12u1 | DSA-5932-1 | ||
| thunderbird | source | (unstable) | 1:128.11.0esr-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2025-36/#CVE-2025-4918
https://www.mozilla.org/en-US/security/advisories/mfsa2025-37/#CVE-2025-4918
https://www.mozilla.org/en-US/security/advisories/mfsa2025-38/#CVE-2025-4918
https://www.mozilla.org/en-US/security/advisories/mfsa2025-40/#CVE-2025-4918