{"cve":"CVE-2025-38643","nvd":{"published":"2025-08-22T16:15:38.417","modified":"2026-10-15T22:18:48.070","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()\n\nCallers of wdev_chandef() must hold the wiphy mutex.\n\nBut the worker cfg80211_propagate_cac_done_wk() never takes the lock.\nWhich triggers the warning below with the mesh_peer_connected_dfs\ntest from hostapd and not (yet) released mac80211 code changes:\n\nWARNING: CPU: 0 PID: 495 at net/wireless/chan.c:1552 wdev_chandef+0x60/0x165\nModules linked in:\nCPU: 0 UID: 0 PID: 495 Comm: kworker/u4:2 Not tainted 6.14.0-rc5-wt-g03960e6f9d47 #33 13c287eeabfe1efea01c0bcc863723ab082e17cf\nWorkqueue: cfg80211 cfg80211_propagate_cac_done_wk\nStack:\n 00000000 00000001 ffffff00 6093267c\n 00000000 6002ec30 6d577c50 60037608\n 00000000 67e8d108 6063717b 00000000\nCall Trace:\n [<6002ec30>] ? _printk+0x0/0x98\n [<6003c2b3>] show_stack+0x10e/0x11a\n [<6002ec30>] ? _printk+0x0/0x98\n [<60037608>] dump_stack_lvl+0x71/0xb8\n [<6063717b>] ? wdev_chandef+0x60/0x165\n [<6003766d>] dump_stack+0x1e/0x20\n [<6005d1b7>] __warn+0x101/0x20f\n [<6005d3a8>] warn_slowpath_fmt+0xe3/0x15d\n [<600b0c5c>] ? mark_lock.part.0+0x0/0x4ec\n [<60751191>] ? __this_cpu_preempt_check+0x0/0x16\n [<600b11a2>] ? mark_held_locks+0x5a/0x6e\n [<6005d2c5>] ? warn_slowpath_fmt+0x0/0x15d\n [<60052e53>] ? unblock_signals+0x3a/0xe7\n [<60052f2d>] ? um_set_signals+0x2d/0x43\n [<60751191>] ? __this_cpu_preempt_check+0x0/0x16\n [<607508b2>] ? lock_is_held_type+0x207/0x21f\n [<6063717b>] wdev_chandef+0x60/0x165\n [<605f89b4>] regulatory_propagate_dfs_state+0x247/0x43f\n [<60052f00>] ? um_set_signals+0x0/0x43\n [<605e6bfd>] cfg80211_propagate_cac_done_wk+0x3a/0x4a\n [<6007e460>] process_scheduled_works+0x3bc/0x60e\n [<6007d0ec>] ? move_linked_works+0x4d/0x81\n [<6007d120>] ? assign_work+0x0/0xaa\n [<6007f81f>] worker_thread+0x220/0x2dc\n [<600786ef>] ? set_pf_worker+0x0/0x57\n [<60087c96>] ? to_kthread+0x0/0x43\n [<6008ab3c>] kthread+0x2d3/0x2e2\n [<6007f5ff>] ? worker_thread+0x0/0x2dc\n [<6006c05b>] ? calculate_sigpending+0x0/0x56\n [<6003b37d>] new_thread_handler+0x4a/0x64\nirq event stamp: 614611\nhardirqs last  enabled at (614621): [<00000000600bc96b>] __up_console_sem+0x82/0xaf\nhardirqs last disabled at (614630): [<00000000600bc92c>] __up_console_sem+0x43/0xaf\nsoftirqs last  enabled at (614268): [<00000000606c55c6>] __ieee80211_wake_queue+0x933/0x985\nsoftirqs last disabled at (614266): [<00000000606c52d6>] __ieee80211_wake_queue+0x643/0x985","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/2c5dee15239f3f3e31aa5c8808f18996c039e2c1","https://git.kernel.org/stable/c/4a63523d3541eef4cf504a9682e6fbe94ffe79a6","https://git.kernel.org/stable/c/7022df2248c08c6f75a01714163ac902333bf3db","https://git.kernel.org/stable/c/b3d24038eb775f2f7a1dfef58d8e1dc444a12820","https://git.kernel.org/stable/c/dbce810607726408f889d3358f4780fd1436861e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:07:46.309729541+00:00"},"epss":{"cve":"CVE-2025-38643","score":0.00186,"percentile":0.08173,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}