{"id":"CVE-2025-38643","summary":"wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()","details":"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 [\u003c6002ec30\u003e] ? _printk+0x0/0x98\n [\u003c6003c2b3\u003e] show_stack+0x10e/0x11a\n [\u003c6002ec30\u003e] ? _printk+0x0/0x98\n [\u003c60037608\u003e] dump_stack_lvl+0x71/0xb8\n [\u003c6063717b\u003e] ? wdev_chandef+0x60/0x165\n [\u003c6003766d\u003e] dump_stack+0x1e/0x20\n [\u003c6005d1b7\u003e] __warn+0x101/0x20f\n [\u003c6005d3a8\u003e] warn_slowpath_fmt+0xe3/0x15d\n [\u003c600b0c5c\u003e] ? mark_lock.part.0+0x0/0x4ec\n [\u003c60751191\u003e] ? __this_cpu_preempt_check+0x0/0x16\n [\u003c600b11a2\u003e] ? mark_held_locks+0x5a/0x6e\n [\u003c6005d2c5\u003e] ? warn_slowpath_fmt+0x0/0x15d\n [\u003c60052e53\u003e] ? unblock_signals+0x3a/0xe7\n [\u003c60052f2d\u003e] ? um_set_signals+0x2d/0x43\n [\u003c60751191\u003e] ? __this_cpu_preempt_check+0x0/0x16\n [\u003c607508b2\u003e] ? lock_is_held_type+0x207/0x21f\n [\u003c6063717b\u003e] wdev_chandef+0x60/0x165\n [\u003c605f89b4\u003e] regulatory_propagate_dfs_state+0x247/0x43f\n [\u003c60052f00\u003e] ? um_set_signals+0x0/0x43\n [\u003c605e6bfd\u003e] cfg80211_propagate_cac_done_wk+0x3a/0x4a\n [\u003c6007e460\u003e] process_scheduled_works+0x3bc/0x60e\n [\u003c6007d0ec\u003e] ? move_linked_works+0x4d/0x81\n [\u003c6007d120\u003e] ? assign_work+0x0/0xaa\n [\u003c6007f81f\u003e] worker_thread+0x220/0x2dc\n [\u003c600786ef\u003e] ? set_pf_worker+0x0/0x57\n [\u003c60087c96\u003e] ? to_kthread+0x0/0x43\n [\u003c6008ab3c\u003e] kthread+0x2d3/0x2e2\n [\u003c6007f5ff\u003e] ? worker_thread+0x0/0x2dc\n [\u003c6006c05b\u003e] ? calculate_sigpending+0x0/0x56\n [\u003c6003b37d\u003e] new_thread_handler+0x4a/0x64\nirq event stamp: 614611\nhardirqs last  enabled at (614621): [\u003c00000000600bc96b\u003e] __up_console_sem+0x82/0xaf\nhardirqs last disabled at (614630): [\u003c00000000600bc92c\u003e] __up_console_sem+0x43/0xaf\nsoftirqs last  enabled at (614268): [\u003c00000000606c55c6\u003e] __ieee80211_wake_queue+0x933/0x985\nsoftirqs last disabled at (614266): [\u003c00000000606c52d6\u003e] __ieee80211_wake_queue+0x643/0x985","modified":"2026-04-02T12:48:04.181440Z","published":"2025-08-22T16:00:49.172Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03601-1","SUSE-SU-2025:03602-1","SUSE-SU-2025:03633-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","SUSE-SU-2025:3725-1","SUSE-SU-2025:3751-1","openSUSE-SU-2025:20081-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38643.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2c5dee15239f3f3e31aa5c8808f18996c039e2c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4a63523d3541eef4cf504a9682e6fbe94ffe79a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7022df2248c08c6f75a01714163ac902333bf3db"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b3d24038eb775f2f7a1dfef58d8e1dc444a12820"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dbce810607726408f889d3358f4780fd1436861e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/defe9ce121160788547e8e6ec4438ad8a14f40dd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38643.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38643"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d"},{"fixed":"defe9ce121160788547e8e6ec4438ad8a14f40dd"},{"fixed":"b3d24038eb775f2f7a1dfef58d8e1dc444a12820"},{"fixed":"4a63523d3541eef4cf504a9682e6fbe94ffe79a6"},{"fixed":"7022df2248c08c6f75a01714163ac902333bf3db"},{"fixed":"dbce810607726408f889d3358f4780fd1436861e"},{"fixed":"2c5dee15239f3f3e31aa5c8808f18996c039e2c1"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"2dbb6faebb94d6d5ae87e5ea6be9280c366393e1"},{"last_affected":"a4f85674e4693904ade7cbf6722d0d105d8062d8"},{"last_affected":"e233cbaf8ecc5859f0417dd53899da4edb477991"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38643.json"}}],"schema_version":"1.7.5"}