Linux Kernel iwlwifi Driver Firmware Communication Vulnerability

A vulnerability in the Linux kernel's iwlwifi driver has been addressed, which involved improper communication with the firmware. The issue arose when the driver attempted to send commands to a firmware that was no longer active, leading to a warning about the CPU and process ID. This vulnerability has been resolved by adding a check to ensure the firmware is operational before dispatching commands.

Impact

The vulnerability could lead to warnings about the CPU state, indicating potential issues in the driver's communication with the firmware.