{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2026-40393", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-04-12T18:49:18.544Z", "datePublished": "2026-04-12T18:49:18.984Z", "dateUpdated": "2026-04-12T18:56:36.231Z"}, "containers": {"cna": {"affected": [{"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"}]}], "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"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"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-04-12T18:56:36.231Z"}, "references": [{"url": "https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html"}, {"url": "https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mesa3d:mesa:*:*:*:*:*:*:*:*", "versionEndExcluding": "25.3.6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mesa3d:mesa:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0.0", "versionEndExcluding": "26.0.1"}]}]}]}}, "dataVersion": "5.2"}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-40393", "lastModified": "2026-04-12T19:16:20.797", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-04-12T19:16:20.797", "references": [{"source": "cve@mitre.org", "url": "https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866"}, {"source": "cve@mitre.org", "url": "https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "cve@mitre.org", "type": "Primary"}]}

{}

{}