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Critical 9.8Published Apr 12, 2026
CVE-2026-40393In 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.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mesa3d mesa mesa3d:mesa | before 25.3.6; 26.0.0 | NVD |
References
- https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866issue-tracking
- https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.htmlissue-tracking, mailing-list
- https://lists.debian.org/debian-lts-announce/2026/07/msg00021.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.