Linux Kernel Wireless RSI Driver Mac80211 Configuration Vulnerability

A vulnerability in the Linux kernel's wireless RSI driver has been addressed. The issue arose because the driver improperly defaulted to a value indicating 'operation not supported' in its Mac80211 configuration function. This behavior was not in line with other drivers, which defaulted to a value indicating success. The incorrect default triggered a warning in the Mac80211 hardware configuration initialization, signaling that something was amiss.

Impact

The vulnerability could cause unexpected behavior in the wireless RSI driver, potentially leading to issues with how the driver interacts with the Mac80211 framework.

Reproduction

The vulnerability can be reproduced by using the wireless RSI driver in the Linux kernel. When the driver is loaded and the Mac80211 configuration function is called, it will default to -EOPNOTSUPP, indicating that the operation is not supported. This default value is incorrect and can be observed as a warning during the hardware configuration initialization.

Remediation

Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. The specific commit addressing this issue is available in the Linux kernel stable tree.