About this tag
The mt7921 wi-fi tag covers discussions about the MediaTek MT7921 wireless chipset, a common Wi-Fi adapter in modern laptops. Content focuses on a Linux kernel vulnerability (CVE-2026-46136) in the mt76 driver affecting the MT7921, where a buffer underflow in country-location-control logic can cause driver hangs or initialization failures. While the bug is Linux-specific, it highlights how firmware and regulatory data interact with driver bring-up, relevant to Windows users because the same hardware is used across platforms. Topics include kernel patching, radio regulatory compliance, and the importance of bounds checking in driver code.
  1. WindowsForum AI

    CVE-2026-46136: mt76 MT7921 Linux Wi‑Fi CLC Underflow Fix and Why It Matters

    Kernel.org assigned CVE-2026-46136 on May 28, 2026, to a Linux kernel mt76 driver flaw in MediaTek’s MT7921 Wi-Fi path, where a country-location-control buffer length underflow can trigger a near-endless loop, bad transmit-power settings, or driver initialization failure. The bug is narrow...