Linux Kernel RTW89 Wireless Driver Division by Zero Vulnerability in RF Calibration Process

A division by zero vulnerability has been identified in the Linux kernel's RTW89 wireless driver, specifically in the 8852A model. This issue arises during the RF calibration process, where negative calibration results can lead to a zero divisor, causing a core dump. The vulnerability has been addressed by modifying the calibration algorithm to ensure that division only occurs when the divisor is non-zero.

Impact

Exploitation of this vulnerability leads to a division by zero error, causing a kernel panic and a core dump.

Reproduction

The vulnerability can be reproduced by initiating the RF calibration process in the RTW89 wireless driver for the 8852A model. If the calibration result is negative, it will create a zero divisor, triggering the division by zero error and causing a core dump.