In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: mgmt: fix locking in unpair_device/disconnect_sync
Dereferencing RCU-protected pointers outside critical sections is invalid and may lead to UAF.
Take hdev->lock for hci_conn lookup and hci_abort_conn(). Dont use RCU to ensure the conn is fully initialized at this point.
References
- https://git.kernel.org/stable/c/16cd66443957e4ad42155c6fec401012f600c6f8
- https://git.kernel.org/stable/c/579faba5ede6df6b7f36777c431dc8dcf9d272e7
- https://git.kernel.org/stable/c/8bc83f9ef6789571f399ff631a2a14a12b6d8585
- https://git.kernel.org/stable/c/b11511006f9e17000de3f4cadee451364f658ca3
- https://git.kernel.org/stable/c/ca58ad287bfc5b9d31a72ecb8650289df2b57250