CVE-2026-64406

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64406

Key Details

CVE	CVE-2026-64406
CVSS Score / Version	8.0 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is low; 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-416 (Use After Free)

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 UAF in bt_accept_dequeue()

bt_accept_get() takes a temporary reference before dropping the accept

queue lock. bt_accept_dequeue() currently drops that reference before

bt_accept_unlink(), leaving only the queue reference.

bt_accept_unlink() drops the queue reference. The subsequent

sock_hold() therefore accesses freed memory if it was the final

reference, as observed by KASAN during listening L2CAP socket cleanup.

Retain the temporary queue-walk reference through unlink and hand it to

the caller on success. Drop it explicitly on the closed and

not-yet-connected paths. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64406
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64406

Source

Reference

NVD

CVE