Linux Kernel iwlwifi Driver TX Rate Handling Vulnerability on Legacy Devices

A vulnerability exists in the Linux kernel's iwlwifi driver, specifically in the management of transmission (TX) rates for older devices like the 7265D. These devices still use an outdated rate encoding system that relies on Physical Layer Convergence Protocol (PLCP) values instead of the newer CCK/OFDM rate indices. The issue arose when the driver was updated to support a new rate version, leading to incorrect TX rate commands being sent to the device. This mismanagement could cause warnings when the device reported its used rates, potentially disrupting wireless communication.

Impact

The vulnerability could lead to improper transmission rate management, causing communication issues on affected devices.