CVE-2026-64406
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix UAF in bt_accept_dequeue() bt_accept_get() takes a temporary reference befor…
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.10.259 before 5.10.261 from 5.15.210 before 5.15.212 from 6.1.175 before 6.1.178 from 6.6.142 before 6.6.145 from 6.12.92 before 6.12.96 from 6.18.34 before 6.18.39 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0
- https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614
- https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a
- https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049
- https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db
- https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547
- https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d
- https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6