CVE-2026-53072

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-53072

Key Details

CVE	CVE-2026-53072
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-667 (Improper Locking)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-53072
CVE	https://www.cve.org/CVERecord?id=CVE-2026-53072

Source

Reference

NVD

CVE