CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's Bluetooth subsystem, specifically in the handling of ISO connections, where a race condition can lead to a double decrement of reference counts, resulting in a use-after-free condition. This flaw may allow an attacker to exploit the race to potentially execute arbitrary code or cause a denial of service. Organizations utilizing Linux systems with Bluetooth capabilities should prioritize this issue to mitigate potential security risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix refcounting of iso_conn iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn: [Task hdev->workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn->sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) <---------ยด if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */ The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk. Fix by having iso_pi(sk)->conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.