ksmbd: unset conn->binding on failed binding request_CVE-2026-31409

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: unset conn->binding on failed binding request\n\nWhen a multichannel SMB2_SESSION_SETUP request with\nSMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn->binding = true\nbut never clears it on the error path. This leaves the connection in\na binding state where all subsequent ksmbd_session_lookup_all() calls\nfall back to the global sessions table. This fix it by clearing\nconn->binding = false in the error path.",
    "published": "2026-04-06T07:38:21.223Z",
    "modified": "2026-04-27T14:02:56.938Z",
    "type": "cve",
    "title": "ksmbd: unset conn->binding on failed binding request",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e\nhttps://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921\nhttps://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca\nhttps://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772\nhttps://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60\nhttps://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03",
    "id": "CVE-2026-31409",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux f5a544e3bab78142207e0242d22442db85ba1eff\nLinux Linux f5a544e3bab78142207e0242d22442db85ba1eff\nLinux Linux f5a544e3bab78142207e0242d22442db85ba1eff\nLinux Linux f5a544e3bab78142207e0242d22442db85ba1eff\nLinux Linux f5a544e3bab78142207e0242d22442db85ba1eff\nLinux Linux f5a544e3bab78142207e0242d22442db85ba1eff\nLinux Linux 5.15",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "f5a544e3bab78142207e0242d22442db85ba1eff",
    "vendor": "Linux",
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    "ai_score": 0
}