CVE-2026-40393 HIGH

CVE-2026-40393

Vendor Mesa3D
Product Mesa
Weakness CWE-787
Published April 12, 2026
Last update April 13, 2026

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 12, 2026 CVE published
April 13, 2026 Record updated