CVE-2021-47393

Summary for CVE-2021-47393 (Linux kernel): The mlxreg_fan hardware monitor driver (mlxsw_core) contains a defect where returning a non-zero error when the fan current state is enforced via sysfs prevents thermal statistics updates. This occurs in scenarios where a minimum fan speed is requested v...

kernel: hwmon: (mlxreg-fan) Return non-zero value when fan current state is enforced from sysfs

A vulnerability was found in the Linux kernel's hwmon subsystem, specifically in the mlxreg-fan driver. The issue arises when the driver’s sysfs interface for controlling fan speed does not properly handle cases where the requested minimum fan speed exceeds the maximum allowable value. When the...