CVE-2024-26886

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.7.6

Description The issue is related to a deadlock in the Bluetooth module of the Linux kernel. Attempting to do a sock lock on .recvmsg may cause a deadlock. To avoid this, the kernel now uses sk receive queue.lock on bt sock ioctl instead of sock sock. This change prevents a potential Use-After-Free (UAF) condition. The problem was identified when a task was blocked for more than 30 seconds, indicating a deadlock. The call trace shows the sequence of events leading to the deadlock, involving functions such as schedule, schedule, lock sock, and l2cap sock recv cb.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.