CVE-2026-40393

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866	Issue Tracking
https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html	Issue Tracking Mailing List
https://lists.debian.org/debian-lts-announce/2026/07/msg00021.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mesa3d:mesa::::::::
	cpe:2.3:a:mesa3d:mesa:26.0.0:::::::*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En Mesa antes de 25.3.6 y 26 antes de 26.0.1, puede ocurrir un acceso a memoria fuera de límites en WebGPU porque la cantidad de datos a asignar depende de una parte no confiable, y luego se utiliza para alloca.

Information

Published : 2026-04-12 19:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-40393

Mitre link : CVE-2026-40393

CVE.ORG link : CVE-2026-40393

JSON object : View

Products Affected

mesa3d

mesa

CWE

CWE-787

Out-of-bounds Write

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