CVE-2026-40393

CRITICAL EPSS 26.7%
Published Apr 12, 20262mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Apr 12, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
26.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
mesa3dmesa* <25.3.6
mesa3dmesa26.0.0any

References 2

  • gitlab.freedesktop.org https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866
    Issue Tracking
  • lists.freedesktop.org https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html
    Issue TrackingMailing List

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.