CVE-2025-38643wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac() Callers of wdev_chandef() must hold the wiphy mutex. But the worker cfg80211_propagate_cac_done_wk() never takes the lock. Which triggers the warning below with the mesh_peer_connected_dfs test from hostapd and not (yet) released mac80211 code changes: WARNING: CPU: 0 PID: 495 at net/wireless/chan.c:1552 wdev_chandef+0x60/0x165 Modules linked in: CPU: 0 UID: 0 PID: 495 Comm: kworker/u4:2 Not tainted 6.14.0-rc5-wt-g03960e6f9d47 #33 13c287eeabfe1efea01c0bcc863723ab082e17cf Workqueue: cfg80211 cfg80211_propagate_cac_done_wk Stack: 00000000 00000001 ffffff00 6093267c 00000000 6002ec30 6d577c50 60037608 00000000 67e8d108 6063717b 00000000 Call Trace: [<6002ec30>] ? _printk+0x0/0x98 [<6003c2b3>] show_stack+0x10e/0x11a [<6002ec30>] ? _printk+0x0/0x98 [<60037608>] dump_stack_lvl+0x71/0xb8 [<6063717b>] ? wdev_chandef+0x60/0x165 [<6003766d>] dump_stack+0x1e/0x20 [<6005d1b7>] __warn+0x101/0x20f [<6005d3a8>] warn_slowpath_fmt+0xe3/0x15d [<600b0c5c>] ? mark_lock.part.0+0x0/0x4ec [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<600b11a2>] ? mark_held_locks+0x5a/0x6e [<6005d2c5>] ? warn_slowpath_fmt+0x0/0x15d [<60052e53>] ? unblock_signals+0x3a/0xe7 [<60052f2d>] ? um_set_signals+0x2d/0x43 [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<607508b2>] ? lock_is_held_type+0x207/0x21f [<6063717b>] wdev_chandef+0x60/0x165 [<605f89b4>] regulatory_propagate_dfs_state+0x247/0x43f [<60052f00>] ? um_set_signals+0x0/0x43 [<605e6bfd>] cfg80211_propagate_cac_done_wk+0x3a/0x4a [<6007e460>] process_scheduled_works+0x3bc/0x60e [<6007d0ec>] ? move_linked_works+0x4d/0x81 [<6007d120>] ? assign_work+0x0/0xaa [<6007f81f>] worker_thread+0x220/0x2dc [<600786ef>] ? set_pf_worker+0x0/0x57 [<60087c96>] ? to_kthread+0x0/0x43 [<6008ab3c>] kthread+0x2d3/0x2e2 [<6007f5ff>] ? worker_thread+0x0/0x2dc [<6006c05b>] ? calculate_sigpending+0x0/0x56 [<6003b37d>] new_thread_handler+0x4a/0x64 irq event stamp: 614611 hardirqs last enabled at (614621): [<00000000600bc96b>] __up_console_sem+0x82/0xaf hardirqs last disabled at (614630): [<00000000600bc92c>] __up_console_sem+0x43/0xaf softirqs last enabled at (614268): [<00000000606c55c6>] __ieee80211_wake_queue+0x933/0x985 softirqs last disabled at (614266): [<00000000606c52d6>] __ieee80211_wake_queue+0x643/0x985
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d before defe9ce121160788547e8e6ec4438ad8a14f40dd; from 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d before b3d24038eb775f2f7a1dfef58d8e1dc444a12820; 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d builds before 4a63523d3541eef4cf504a9682e6fbe94ffe79a6; from 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d before 7022df2248c08c6f75a01714163ac902333bf3db; from 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d before dbce810607726408f889d3358f4780fd1436861e; 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d builds before 2c5dee15239f3f3e31aa5c8808f18996c039e2c1; 2dbb6faebb94d6d5ae87e5ea6be9280c366393e1; a4f85674e4693904ade7cbf6722d0d105d8062d8; and 4 more ranges | CNA record |
linux linux_kernel linux:linux_kernel | from 4.14.170 before 4.15; from 4.19.102 before 4.20; from 5.4.18 before 5.5; from 5.5.1 before 6.6.118; from 6.7 before 6.12.57; from 6.13 before 6.15.10; from 6.16 before 6.16.1; 5.5; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/defe9ce121160788547e8e6ec4438ad8a14f40ddpatch
- https://git.kernel.org/stable/c/b3d24038eb775f2f7a1dfef58d8e1dc444a12820patch
- https://git.kernel.org/stable/c/4a63523d3541eef4cf504a9682e6fbe94ffe79a6patch
- https://git.kernel.org/stable/c/7022df2248c08c6f75a01714163ac902333bf3dbpatch
- https://git.kernel.org/stable/c/dbce810607726408f889d3358f4780fd1436861epatch
- https://git.kernel.org/stable/c/2c5dee15239f3f3e31aa5c8808f18996c039e2c1patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.