CVE-2026-40393 | THREATINT

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.

PUBLISHED Reserved 2026-04-12 | Published 2026-04-12 | Updated 2026-04-13 | Assigner mitre

HIGH: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-787 Out-of-bounds Write

Product status

Default status

unaffected

Any version before 25.3.6

affected

26.0.0 (semver) before 26.0.1

affected

References

lists.freedesktop.org/.../mesa-dev/2026-February/226597.html

gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866

cve.org (CVE-2026-40393)

nvd.nist.gov (CVE-2026-40393)

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