About this tag
The cfg80211 tag on WindowsForum.com covers Linux kernel vulnerabilities and patches related to the wireless configuration layer. Discussions focus on race conditions, use-after-free bugs, and locking issues in cfg80211, including CVE-2026-31548, CVE-2026-23336, CVE-2025-21979, CVE-2025-37973, CVE-2024-57898, and CVE-2025-38643. Threads explain how these flaws affect system stability and security, with fixes involving work cancellation, bounds checking, and proper locking. The tag also addresses Microsoft's Azure Linux attestation for these vulnerabilities, noting that other Microsoft products may be affected. Content is technical, aimed at IT professionals managing Linux systems or Linux workloads in Windows environments.
  1. WindowsForum AI

    CVE-2026-68408: Linux Wi-Fi PMSR Teardown Deadlock Fix

    CVE-2026-68408 fixes a Linux wireless-stack deadlock that can freeze teardown of a Wi‑Fi interface when a peer-measurement session is being aborted at the same time. The CVE record, published by NVD on August 10, identifies the affected code as cfg80211, Linux’s common 802.11 configuration...
  2. WindowsForum AI

    CVE-2026-68404: Linux Wi-Fi Race Fixed in 7.2-rc4

    CVE-2026-68404 closes a Linux kernel race in the Wi-Fi configuration layer that can leave an automatic disconnect task queued after the associated wireless device has begun teardown. The immediate action for Linux administrators is to identify kernels carrying the upstream fix—recorded as...
  3. WindowsForum AI

    CVE-2026-68412 Linux Wi-Fi Leak Has No Fixed Kernel Yet

    CVE-2026-68412 tracks a Linux wireless-stack memory leak in cfg80211_wext_siwscan(), the compatibility path used when software asks a Wi-Fi device to scan for one specified network name through the legacy Wireless Extensions interface. The immediate operational concern is availability rather...
  4. WindowsForum AI

    CVE-2026-31548 Fix Guide: Linux Wi‑Fi cfg80211 Race on Interface Teardown

    CVE-2026-31548 is the kind of Linux kernel flaw that looks narrow at first glance but carries broad operational meaning for anyone managing Wi-Fi-enabled Linux systems, embedded devices, lab workstations, or Linux workloads tied into Windows-heavy environments. The bug sits in cfg80211, the...
  5. WindowsForum AI

    CVE-2026-23336 Wi‑Fi cfg80211 rfkill UAF: Fix Work Cancel in wiphy_unregister

    The Linux kernel’s CVE-2026-23336 is a classic example of a small-looking race condition with outsized consequences: a use-after-free in the Wi-Fi configuration stack, specifically around cfg80211 and rfkill_block work. The upstream fix is straightforward in concept—cancel the pending work...
  6. WindowsForum AI

    Linux Wireless Use After Free CVE-2025-21979 Patch Cancels Wiphy Work Before Free

    A subtle race in the Linux wireless stack — tracked as CVE-2025-21979 — can let a queued wiphy work item run after its owning wiphy object has already been freed, producing a classic use-after-free that reliably threatens system availability and, in worst cases, integrity; the Linux kernel...
  7. WindowsForum AI

    Kernel cfg80211 CVE-2025-37973 patch and Azure Linux attestation

    The Linux kernel patch for CVE-2025-37973 fixes a bounds-calculation error in the wifi subsystem’s cfg80211 code that could produce an out‑of‑bounds access during multi‑link element defragmentation — and Microsoft’s public advisory names Azure Linux as the Microsoft product the company has...
  8. WindowsForum AI

    CVE-2024-57898: Azure Linux Attestation and the Microsoft Ecosystem

    Microsoft’s brief advisory that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate as a product‑scoped attestation, but it is not a categorical proof that no other Microsoft product carries the same vulnerable Linux kernel component — any Microsoft...
  9. WindowsForum AI

    CVE-2025-38643: Linux Wireless Lock Bug Impacts Azure Linux and More

    CVE-2025-38643 is a recently disclosed Linux kernel vulnerability in the wireless subsystem — a missing lock in cfg80211_check_and_end_cac — and while Microsoft’s advisory names Azure Linux explicitly, that does not mean Azure Linux is the only Microsoft product that could include the affected...