Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold_CVE-2026-31408

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold\n\nsco_recv_frame() reads conn->sk under sco_conn_lock() but immediately\nreleases the lock without holding a reference to the socket. A concurrent\nclose() can free the socket between the lock release and the subsequent\nsk->sk_state access, resulting in a use-after-free.\n\nOther functions in the same file (sco_sock_timeout(), sco_conn_del())\ncorrectly use sco_sock_hold() to safely hold a reference under the lock.\n\nFix by using sco_sock_hold() to take a reference before releasing the\nlock, and adding sock_put() on all exit paths.",
    "published": "2026-04-06T07:38:20.533Z",
    "modified": "2026-04-27T14:02:55.823Z",
    "type": "cve",
    "title": "Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/d57384e27d1ebf0047e3f00a6e1181b8be9857a2\nhttps://git.kernel.org/stable/c/b0a7da0e3f7442545f071499beb36374714bb9de\nhttps://git.kernel.org/stable/c/45aaca995e4a7a05b272a58e7ab2fff4f611b8f1\nhttps://git.kernel.org/stable/c/108b81514d8f2535eb16651495cefb2250528db3\nhttps://git.kernel.org/stable/c/7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e\nhttps://git.kernel.org/stable/c/e76e8f0581ef555eacc11dbb095e602fb30a5361\nhttps://git.kernel.org/stable/c/598dbba9919c5e36c54fe1709b557d64120cb94b",
    "id": "CVE-2026-31408",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 2.6.12",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
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        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
    "vendor": "Linux",
    "ai_description": "",
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    "ai_score": 0
}