Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer_CVE-2026-53276

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix a use-after-free of the hci_conn pointer\n\nIn iso_sock_rebind_bc(), the bis pointer is cached, then the socket lock is\ndropped:\n\tbis = iso_pi(sk)->conn->hcon;\n\t/* Release the socket before lookups since that requires hci_dev_lock\n\t * which shall not be acquired while holding sock_lock for proper\n\t * ordering.\n\t */\n\trelease_sock(sk);\n\thci_dev_lock(bis->hdev);\n\nDuring the unlocked window, could a concurrent close() destroy the connection\nand free the bis structure, causing hci_dev_lock(bis->hdev) to access memory\nafter it is freed, fix this by using the hdev reference which was safely\nacquired via iso_conn_get_hdev().",
    "published": "2026-06-25T08:39:59.804Z",
    "modified": "2026-06-28T06:41:19.460Z",
    "type": "cve",
    "title": "Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/d324b8aa20bd3c3394e3647dc22491d88f3f4e7a\nhttps://git.kernel.org/stable/c/f50331f2a1441ec49988832c3a95f2edacc47322",
    "id": "CVE-2026-53276",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux d3413703d5f8b7d1e6f514f9440ed5da1bc30796\nLinux Linux d3413703d5f8b7d1e6f514f9440ed5da1bc30796\nLinux Linux 6.19",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/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": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "d3413703d5f8b7d1e6f514f9440ed5da1bc30796",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}