CVE-2026-40393CRITICAL 9.8EPSS p26.6%

CVE-2026-40393CVE-2026-40393

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.35% probability of exploitation · percentile 26.6% · 2026-06-18T12:00:27Z
Published2026-04-12
Last modified2026-04-16

Underlying weaknesses· 1

CWE-787

References

  1. https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866
  2. https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html

1

TypeTargetConfidenceTier
WeaknessOut-of-bounds Writecwe-7870%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-2315
CVE
CVE-2026-9121
CVE
CVE-2026-11015
CVE
CVE-2025-11205
CVE
CVE-2026-11667
CVE
CVE-2025-14765
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.