Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync_CVE-2026-43019

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix potential UAF in set_cig_params_sync\n\nhci_conn lookup and field access must be covered by hdev lock in\nset_cig_params_sync, otherwise it's possible it is freed concurrently.\n\nTake hdev lock to prevent hci_conn from being deleted or modified\nconcurrently.  Just RCU lock is not suitable here, as we also want to\navoid \"tearing\" in the configuration.",
    "published": "2026-05-01T14:15:23.035Z",
    "modified": "2026-05-03T05:46:06.840Z",
    "type": "cve",
    "title": "Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02\nhttps://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f\nhttps://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449\nhttps://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c",
    "id": "CVE-2026-43019",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux a091289218202bc09d9b9caa8afcde1018584aec\nLinux Linux a091289218202bc09d9b9caa8afcde1018584aec\nLinux Linux a091289218202bc09d9b9caa8afcde1018584aec\nLinux Linux a091289218202bc09d9b9caa8afcde1018584aec\nLinux Linux 3a273cd0f47dd672d37736e623849374f9ab9ce9\nLinux Linux d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062\nLinux Linux 6.6",
    "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": [],
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        "baseScore": 0,
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        "confidentialityImpact": "",
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        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "a091289218202bc09d9b9caa8afcde1018584aec",
    "vendor": "Linux",
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    "ai_score": 0
}