b43legacy driver

The b43legacy driver is a Linux kernel module for Broadcom BCM43xx wireless chipsets, enabling Wi-Fi connectivity on older hardware. Recent discussions on WindowsForum.com highlight a security vulnerability, CVE-2026-46163, which involves an out-of-bounds read in the driver's key array due to an unchecked firmware-controlled key index. The fix adds a guardrail to reject invalid key indexes, emphasizing the importance of proactive bounds checking in kernel security. While the b43legacy driver is primarily a Linux component, its relevance to Windows users may arise in dual-boot or virtualization scenarios where Linux handles Wi-Fi for legacy Broadcom adapters. The tag covers driver functionality, security patches, and kernel-level fixes.