| Name | CVE-2025-8027 |
| Description | On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability affects Firefox < 141, Firefox ESR < 115.26, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1. |
| 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-4250-1, DLA-4253-1, DSA-5964-1, DSA-5966-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 142.0.1-1 | fixed |
| firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | vulnerable |
| bullseye (security) | 128.14.0esr-1~deb11u1 | fixed | |
| bookworm | 128.10.0esr-1~deb12u1 | vulnerable | |
| bookworm (security) | 128.14.0esr-1~deb12u1 | fixed | |
| trixie | 128.13.0esr-1 | fixed | |
| trixie (security) | 128.14.0esr-1~deb13u1 | fixed | |
| forky, sid | 128.14.0esr-1 | fixed | |
| thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | vulnerable |
| bullseye (security) | 1:128.14.0esr-1~deb11u1 | fixed | |
| bookworm | 1:128.10.0esr-1~deb12u1 | vulnerable | |
| bookworm (security) | 1:128.14.0esr-1~deb12u1 | fixed | |
| trixie | 1:128.13.0esr-1 | fixed | |
| trixie (security) | 1:128.14.0esr-1~deb13u1 | fixed | |
| forky, sid | 1:128.14.0esr-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) | 141.0-1 | |||
| firefox-esr | source | bullseye | 128.13.0esr-1~deb11u1 | DLA-4250-1 | ||
| firefox-esr | source | bookworm | 128.13.0esr-1~deb12u1 | DSA-5964-1 | ||
| firefox-esr | source | (unstable) | 128.13.0esr-1 | |||
| thunderbird | source | bullseye | 1:128.13.0esr-1~deb11u1 | DLA-4253-1 | ||
| thunderbird | source | bookworm | 1:128.13.0esr-1~deb12u1 | DSA-5966-1 | ||
| thunderbird | source | (unstable) | 1:128.13.0esr-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2025-56/#CVE-2025-8027
https://www.mozilla.org/en-US/security/advisories/mfsa2025-58/#CVE-2025-8027
https://www.mozilla.org/en-US/security/advisories/mfsa2025-62/#CVE-2025-8027