Description
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.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0 Patch
- git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614 Patch
- git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a Patch
- git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049 Patch
- git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db Patch
- git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547 Patch
- git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d Patch
- git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6 Patch
Metrics
- CVSS 3.1
-
8.0
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 20 · as of 14 November 2026
- CWE
- CWE-416
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.