CVE-2026-68404 is a vulnerability in Linux Kernel
Published on August 10, 2026
wifi: cfg80211: use wiphy work for socket owner autodisconnect
In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: use wiphy work for socket owner autodisconnect
nl80211_netlink_notify() walks the cfg80211 wireless device list when a
NETLINK_GENERIC socket is released. If the socket owns a connection, the
notifier queues the embedded wdev->disconnect_wk work item.
That work is a plain work_struct today. NETDEV_GOING_DOWN cancels it, but a
NETLINK_URELEASE notifier that already observed conn_owner_nlportid can
queue it after that cancel returns. _cfg80211_unregister_wdev() then
removes the wdev from the list and waits for RCU readers, but
synchronize_net() does not drain work queued by such a reader.
Make the autodisconnect work a wiphy_work instead. The callback already
needs the wiphy mutex, and wiphy_work runs under that mutex. This lets
teardown cancel pending autodisconnect work while holding the mutex,
without a cancel_work_sync() vs. worker locking concern.
Also cancel the wiphy work after list_del_rcu() and synchronize_net(). Any
NETLINK_URELEASE notifier that had already reached the wdev list has then
either queued the work and it is removed, or can no longer find the wdev.
Products Associated with CVE-2026-68404
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version bd2522b168847106c1885f0319a2833bdf88bf9a and below 6d6123fef5a4af175cc6b6b12a03dd0f3c240b79 is affected.
- Version bd2522b168847106c1885f0319a2833bdf88bf9a and below 0c2ed186bbe14304415476d6707b747dddcd8583 is affected.
- Version 4.11 is affected.
- Before 4.11 is unaffected.
- Version 7.1.6, <= 7.1.* is unaffected.
- Version 7.2-rc4, <= * is unaffected.