High 8.8Published Jun 24, 2026

CVE-2026-53072Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER

Updated under an hour ago (Oct 28, 2026, 7:23 PM ET)

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	70c464256310e1c3716099b9d02ece4169272f73 builds before 60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4; 70c464256310e1c3716099b9d02ece4169272f73 builds before 9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e; from 70c464256310e1c3716099b9d02ece4169272f73 before c7777f534a8018ae4bb1c80d8925af4df588a314; 70c464256310e1c3716099b9d02ece4169272f73 builds before 6b4d226d01ab7da0d2027a2a1e3a6079152e5065; from 70c464256310e1c3716099b9d02ece4169272f73 before 541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f; from 70c464256310e1c3716099b9d02ece4169272f73 before 385b2d0468a0871fc716c549fa3b0c257c7dbcb3; from 70c464256310e1c3716099b9d02ece4169272f73 before c27224daf0b08efbb2b24ed64b6139b294f5473a; 70c464256310e1c3716099b9d02ece4169272f73 builds before 5c7209a341ff2ac338b2b0375c34a307b37c9ac2	CNA record
linux linux_kernel linux:linux_kernel	from 3.17 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10	NVD

References

References

https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4	patch
https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e	patch
https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314	patch
https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065	patch
https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f	patch
https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3	patch
https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a	patch
https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.