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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.

🗓️ 14 Apr 2026 08:01:32Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 3 Views

CVE-2026-40393 affects Microsoft products.

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18 Apr 2026 08:01Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.18.1 - 9.8
EPSS0.00348
SSVC
3