Linux Kernel FP9931 Regulator PM Runtime Reference Leak Vulnerability

A PM runtime reference leak vulnerability has been identified in the Linux kernel's FP9931 regulator driver. The issue arises in the 'fp9931_hwmon_read()' function, where a failure in 'regmap_read()' is not properly handled. Instead of releasing the PM runtime reference, the function returns an error code, leading to a reference leak. This vulnerability affects the Linux kernel stable tree.

Impact

Exploitation of this vulnerability causes a PM runtime reference leak, which can lead to improper power management and potential resource exhaustion.

Remediation

The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version.