Linux Kernel Wi-Fi Driver Fragment Handling Vulnerability in mt76: mt7996

A vulnerability in the Linux kernel's Wi-Fi driver for the mt76: mt7996 chipset has been addressed. The issue involved improper handling of IEEE 802.11 fragmentation, which can only be applied to unicast frames. The vulnerability allowed fragments with multicast or broadcast recipient addresses to be processed, contrary to the specifications. This patch resolves the issue and addresses related vulnerabilities such as CVE-2020-26145.

Impact

The vulnerability could lead to incorrect fragmentation handling, potentially allowing multicast or broadcast fragments to be processed as unicast, which could disrupt normal Wi-Fi operations.