CVE-2026-53072High· 8.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls hci_connect_cfm(conn) without hd…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
0.2% → 0.2%
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER
When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls hci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm() assumes it is held, and if conn is deleted concurrently -> UAF.
Only SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen, and HCI_EV_CONN_REQUEST is not generated for ISO. In the non-deferred listening socket code paths, hci_connect_cfm(conn) is called with hdev->lock held.
Fix by holding the lock.
Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 9d4a6c0f43fc5e4d4f062e8e450e5483eb74176eLinux >= 70c464256310e1c3716099b9d02ece4169272f73 < c7777f534a8018ae4bb1c80d8925af4df588a314Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 6b4d226d01ab7da0d2027a2a1e3a6079152e5065Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 541d5bf9b5afaf41090b2a3aa7b47f2db2ff801fLinux >= 70c464256310e1c3716099b9d02ece4169272f73 < 385b2d0468a0871fc716c549fa3b0c257c7dbcb3Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < c27224daf0b08efbb2b24ed64b6139b294f5473aLinux >= 70c464256310e1c3716099b9d02ece4169272f73 < 5c7209a341ff2ac338b2b0375c34a307b37c9ac2Linux 3.17Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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