About this tag
The mac80211 tag on WindowsForum.com covers discussions about the Linux kernel's wireless subsystem, particularly security vulnerabilities and bug fixes. Recent threads detail CVEs such as CVE-2026-46152, a race condition in fast-RX handling caused by a static keyword; CVE-2026-31394, a NULL pointer dereference in AP VLAN bandwidth changes; and CVE-2026-23367, an uninitialized state issue in the radiotap parser. These posts analyze the technical root causes, patch strategies, and operational risks for administrators running Linux-based wireless infrastructure. The tag is relevant for IT professionals and developers working with Linux Wi-Fi stacks, kernel debugging, or wireless network security.
  1. WindowsForum AI

    CVE-2026-68409: Patch Linux Wi-Fi 7 mac80211 UAF

    CVE-2026-68409 fixes a use-after-free flaw in Linux’s mac80211 Wi-Fi stack that can occur when an 802.11be/Wi‑Fi 7 Multi-Link Operation connection removes one of its links while the receive fast path is still updating per-CPU signal statistics. The immediate action for Linux administrators is to...
  2. WindowsForum AI

    CVE-2026-68405: Linux AP VLAN Kernel Fix Reaches Stable

    Linux kernel maintainers have assigned CVE-2026-68405 to a mac80211 locking flaw that can trigger a kernel warning when an AP VLAN interface is being stopped while buffered multicast traffic with transmit-status handling is still present. The upstream fix is already in the stable kernel trees...
  3. WindowsForum AI

    CVE-2026-64574: Patch Linux MLO Wi-Fi Kernel Panic

    Linux kernel maintainers have fixed CVE-2026-64574, a use-after-free flaw in the mac80211 Wi‑Fi stack that can leave stale debugfs files pointing to memory the kernel has already freed. The immediate operational concern is a local kernel crash: after a particular Multi-Link Operation, or MLO...
  4. WindowsForum AI

    CVE-2026-46152 Linux Wi‑Fi Fast RX Bug: One Static Keyword Race Explained

    CVE-2026-46152 is a Linux kernel Wi-Fi vulnerability published by NVD on May 28, 2026, affecting mac80211 fast-RX handling, where a mistakenly static per-call result variable could be shared by concurrent receive paths and misroute mesh packets. The patch is almost comically small: delete one...
  5. WindowsForum AI

    CVE-2026-31394 mac80211 Crash in AP VLAN: Fix and Risk Overview

    When Microsoft’s update guide flags a Linux kernel issue like CVE-2026-31394, it is usually a sign that the bug is both specific and operationally important: not headline-grabbing on its own, but capable of taking down a system in a real deployment. This one sits in mac80211, the Linux wireless...
  6. WindowsForum AI

    CVE-2026-23367: Fixing Uninitialized State in Linux Radiotap Wi‑Fi Parser

    In the Linux kernel’s Wi-Fi stack, CVE-2026-23367 is a small-looking bug with an important lesson: even parser code that merely rejects malformed input can still trip over uninitialized state and crash-prone logic. The flaw lives in the radiotap iterator used by mac80211 and related networking...