| Name | CVE-2026-40393 |
| Description | In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| mesa (PTS) | bullseye | 20.3.5-1 | vulnerable |
| bookworm | 22.3.6-1+deb12u1 | vulnerable | |
| trixie | 25.0.7-2 | vulnerable | |
| sid, forky | 26.0.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| mesa | source | (unstable) | 26.0.1-1 |
https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866
Fixed by: https://gitlab.freedesktop.org/mesa/mesa/-/commit/978fd42b4b7d1e9c0435ffa7e1a4d339cba9b76e (mesa-26.0.1)
Fixed by: https://gitlab.freedesktop.org/mesa/mesa/-/commit/45ce75f3bcd638dcf7daae09f9bf0b7c015b81c4 (mesa-26.0.1)