Out-of-bounds Write Affecting mesa3d/mesa package, versions [,26.1.0-rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Apr 2026
- disclosed12 Apr 2026
- creditUnknown
Introduced: 12 Apr 2026
CVE-2026-40393 (opens in a new tab)How to fix?
Upgrade mesa3d/mesa to version 26.1.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in the allocation process in WebGPU due to the amount of data to be allocated being determined by untrusted input and subsequently used in alloca. An attacker can achieve arbitrary code execution or cause a denial of service by supplying crafted input that leads to out-of-bounds memory access.