Linux Kernel USB Type-C NULL Pointer Dereference Vulnerability

A vulnerability in the Linux kernel's USB Type-C handling has been addressed, which could lead to a NULL pointer dereference. This issue arose from concurrent calls to unlink a Type-C partner device, potentially causing a NULL pointer access. The vulnerability has been resolved by introducing a mutex to safeguard USB device pointers, preventing the NULL pointer dereference. This mutex also protects partner device registrations.

Impact

Exploitation of this vulnerability could lead to a NULL pointer dereference, causing a kernel crash or undefined behavior.