CVE-2026-40393_CVE-2026-40393

8.1 / 10

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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.

Basic Information

ID CVE-2026-40393

Source mitre

Published Apr 12, 2026 at 18:49

Modified Apr 12, 2026 at 18:56

Affected Product

Vendor mesa3d

Product Mesa

Affected Versions mesa3d Mesa 0
mesa3d Mesa 26.0.0

CWE Classification

CWE-787

References

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    "lastseen": "",
    "description": "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.",
    "published": "2026-04-12T18:49:18.984Z",
    "modified": "2026-04-12T18:56:36.231Z",
    "type": "cve",
    "title": "CVE-2026-40393",
    "source": "mitre",
    "references": "https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html\nhttps://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866",
    "id": "CVE-2026-40393",
    "bulletinFamily": "",
    "cwe": [
        "CWE-787"
    ],
    "cvelist": null,
    "sourceData": "mesa3d Mesa 0\nmesa3d Mesa 26.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Mesa",
    "version": "0",
    "vendor": "mesa3d",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}