{"id":"CVE-2023-53016","summary":"Bluetooth: Fix possible deadlock in rfcomm_sk_state_change","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix possible deadlock in rfcomm_sk_state_change\n\nsyzbot reports a possible deadlock in rfcomm_sk_state_change [1].\nWhile rfcomm_sock_connect acquires the sk lock and waits for\nthe rfcomm lock, rfcomm_sock_release could have the rfcomm\nlock and hit a deadlock for acquiring the sk lock.\nHere's a simplified flow:\n\nrfcomm_sock_connect:\n  lock_sock(sk)\n  rfcomm_dlc_open:\n    rfcomm_lock()\n\nrfcomm_sock_release:\n  rfcomm_sock_shutdown:\n    rfcomm_lock()\n    __rfcomm_dlc_close:\n        rfcomm_k_state_change:\n\t  lock_sock(sk)\n\nThis patch drops the sk lock before calling rfcomm_dlc_open to\navoid the possible deadlock and holds sk's reference count to\nprevent use-after-free after rfcomm_dlc_open completes.","modified":"2026-04-02T09:43:33.732180Z","published":"2025-03-27T16:43:44.528Z","related":["SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1195-1","SUSE-SU-2025:1241-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53016.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/17511bd84871f4a6106cb335616e086880313f3f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1d80d57ffcb55488f0ec0b77928d4f82d16b6a90"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98aec50ff7f60cc6f2d6a4396b475c547e58b04d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53016.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53016"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1804fdf6e494e5e2938c65d8391690b59bcff897"},{"fixed":"98aec50ff7f60cc6f2d6a4396b475c547e58b04d"},{"fixed":"17511bd84871f4a6106cb335616e086880313f3f"},{"fixed":"1d80d57ffcb55488f0ec0b77928d4f82d16b6a90"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53016.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}