CVE Explorer
CVE-2026-40393
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Mesa","vendor":"mesa3d","versions":[{"lessThan":"25.3.6","status":"affected","version":"0","versionType":"semver"},{"lessThan":"26.0.1","status":"affected","version":"26.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:dbaade56fa37cae8ee09cf60ac67e2e58cca0d54f1d22c479598feb67d0b2072 · sha256:de9448b89b76eb31… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:dbaade56fa37cae8ee09cf60ac67e2e58cca0d54f1d22c479598feb67d0b2072 · sha256:de9448b89b76eb31… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:dbaade56fa37cae8ee09cf60ac67e2e58cca0d54f1d22c479598feb67d0b2072 · sha256:de9448b89b76eb31… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"url":"https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:dbaade56fa37cae8ee09cf60ac67e2e58cca0d54f1d22c479598feb67d0b2072 · sha256:de9448b89b76eb31… · /containers/cna/references/1
{"url":"https://lists.debian.org/debian-lts-announce/2026/07/msg00021.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:dbaade56fa37cae8ee09cf60ac67e2e58cca0d54f1d22c479598feb67d0b2072 · sha256:de9448b89b76eb31… · /containers/adp/1/references/0
{"url":"https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:dbaade56fa37cae8ee09cf60ac67e2e58cca0d54f1d22c479598feb67d0b2072 · sha256:de9448b89b76eb31… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.