{ "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" }