Linux Kernel WoWLAN Shutdown Hook Vulnerability in RSI Wireless Driver

A vulnerability exists in the Linux kernel's handling of Wake on WLAN (WoWLAN) for the RSI wireless driver. During system shutdown, the driver improperly manages WoWLAN configurations that were never set, leading to potential null pointer dereferences. This issue affects the Linux kernel stable tree.

Impact

The vulnerability can cause a null pointer dereference during the shutdown process of the RSI wireless driver, which could lead to a system crash.

Reproduction

The vulnerability can be reproduced by using a wireless adapter that relies on the RSI driver and not configuring WoWLAN before shutting down the system. During the shutdown process, the driver will attempt to access a null WoWLAN configuration, causing a null pointer dereference.

Remediation

Users can update to the latest version of the Linux kernel where this vulnerability has been addressed.