CVE-2025-38643 wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: Add missing lock in cfg80211checkandendcac Callers of wdevchandef must hold the wiphy mutex. But the worker cfg80211propagatecacdonewk never takes the lock. Which triggers the warning below with the...

CVE-2025-38643

CVE-2025-38643 concerns the Linux kernel WiFi stack (cfg80211). The issue arises from a missing lock in cfg80211_check_and_end_cac(), requiring callers of wdev_chandef() to hold the wiphy mutex, while cfg80211_propagate_cac_done_wk() does not take the lock. This can trigger warnings like the mesh...