drm/amdgpu: validate doorbell_offset in user queue creation_CVE-2026-31766

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: validate doorbell_offset in user queue creation\n\namdgpu_userq_get_doorbell_index() passes the user-provided\ndoorbell_offset to amdgpu_doorbell_index_on_bar() without bounds\nchecking. An arbitrarily large doorbell_offset can cause the\ncalculated doorbell index to fall outside the allocated doorbell BO,\npotentially corrupting kernel doorbell space.\n\nValidate that doorbell_offset falls within the doorbell BO before\ncomputing the BAR index, using u64 arithmetic to prevent overflow.\n\n(cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)",
    "published": "2026-05-01T14:14:56.622Z",
    "modified": "2026-05-03T05:45:48.292Z",
    "type": "cve",
    "title": "drm/amdgpu: validate doorbell_offset in user queue creation",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3\nhttps://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6\nhttps://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c",
    "id": "CVE-2026-31766",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux f09c1e6077abd1bc2ddd2b97e1135215801ca7f9\nLinux Linux f09c1e6077abd1bc2ddd2b97e1135215801ca7f9\nLinux Linux f09c1e6077abd1bc2ddd2b97e1135215801ca7f9\nLinux Linux 6.16",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}