CVE-2026-40393

HIGH

8.1

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

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

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published4/12/2026

Last Modified4/16/2026

Sourcenvd

Honeypot Sightings0

Affected Products

mesa3d:mesa

Weaknesses (CWE)

CWE-787

References

https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866(cve@mitre.org)

https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html(cve@mitre.org)

IOC Correlations

No correlations recorded

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