In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix UAF on iso_sock_timeout conn->sk maybe have been unlinked/freed while waiting for iso_conn_lock so this checks if the conn->sk is still valid by checking if it part of iso_sk_list.
https://git.kernel.org/stable/c/d75aad1d3143ca68cda52ff80ac392e1bbd84325
https://git.kernel.org/stable/c/876ac72d535fa94f4ac57bba651987c6f990f646
https://git.kernel.org/stable/c/246b435ad668596aa0e2bbb9d491b6413861211a
https://git.kernel.org/stable/c/14bcb721d241e62fdd18f6f434a2ed2ab6e71a9b