Linux Kernel Command Timeout Vulnerability in t7xx WWAN Driver

A vulnerability in the Linux kernel's WWAN t7xx driver has been addressed, concerning a command timeout issue in the finite state machine (FSM) processing. The driver handles internal state change commands using an asynchronous thread. If the main thread detects a timeout, the asynchronous thread may cause a panic by attempting to execute a completion notification, since the main thread's completion object has already been released. This issue leads to a page fault error, as the system is unable to handle the fault for a specific address, causing a kernel panic.

Impact

The vulnerability can cause a kernel panic due to a page fault error, disrupting system operations and potentially leading to a denial of service.