Paper/Archive/CVE-2026-40393

CVE-2026-40393

mesa3d Mesa — 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 de…

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Mesa< 25.3.625.3.6CNA
Mesa26.0.0 – < 26.0.126.0.1CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitre (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

reflists.freedesktop.org/archives/mesa-dev/2026-February/226597.htmlrefgitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866reflists.debian.org/debian-lts-announce/2026/07/msg00021.html