CVE-2025-38643

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Source
https://cve.org/CVERecord?id=CVE-2025-38643
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38643.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38643
Downstream
Related
Published
2025-08-22T16:00:49.172Z
Modified
2026-03-12T02:15:21.503619Z
Summary
wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: Add missing lock in cfg80211checkandendcac()

Callers of wdev_chandef() must hold the wiphy mutex.

But the worker cfg80211propagatecacdonewk() never takes the lock. Which triggers the warning below with the meshpeerconnected_dfs test from hostapd and not (yet) released mac80211 code changes:

WARNING: CPU: 0 PID: 495 at net/wireless/chan.c:1552 wdevchandef+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 cfg80211propagatecacdonewk Stack: 00000000 00000001 ffffff00 6093267c 00000000 6002ec30 6d577c50 60037608 00000000 67e8d108 6063717b 00000000 Call Trace: [<6002ec30>] ? printk+0x0/0x98 [<6003c2b3>] showstack+0x10e/0x11a [<6002ec30>] ? printk+0x0/0x98 [<60037608>] dumpstacklvl+0x71/0xb8 [<6063717b>] ? wdevchandef+0x60/0x165 [<6003766d>] dumpstack+0x1e/0x20 [<6005d1b7>] __warn+0x101/0x20f [<6005d3a8>] warnslowpathfmt+0xe3/0x15d [<600b0c5c>] ? mark_lock.part.0+0x0/0x4ec [<60751191>] ? __thiscpupreemptcheck+0x0/0x16 [<600b11a2>] ? markheldlocks+0x5a/0x6e [<6005d2c5>] ? warnslowpathfmt+0x0/0x15d [<60052e53>] ? unblocksignals+0x3a/0xe7 [<60052f2d>] ? umsetsignals+0x2d/0x43 [<60751191>] ? __thiscpupreemptcheck+0x0/0x16 [<607508b2>] ? lockisheldtype+0x207/0x21f [<6063717b>] wdevchandef+0x60/0x165 [<605f89b4>] regulatorypropagatedfsstate+0x247/0x43f [<60052f00>] ? umsetsignals+0x0/0x43 [<605e6bfd>] cfg80211propagatecacdonewk+0x3a/0x4a [<6007e460>] processscheduledworks+0x3bc/0x60e [<6007d0ec>] ? movelinkedworks+0x4d/0x81 [<6007d120>] ? assignwork+0x0/0xaa [<6007f81f>] workerthread+0x220/0x2dc [<600786ef>] ? setpfworker+0x0/0x57 [<60087c96>] ? tokthread+0x0/0x43 [<6008ab3c>] kthread+0x2d3/0x2e2 [<6007f5ff>] ? workerthread+0x0/0x2dc [<6006c05b>] ? calculatesigpending+0x0/0x56 [<6003b37d>] newthread_handler+0x4a/0x64 irq event stamp: 614611 hardirqs last enabled at (614621): [<00000000600bc96b>] __upconsolesem+0x82/0xaf hardirqs last disabled at (614630): [<00000000600bc92c>] __upconsolesem+0x43/0xaf softirqs last enabled at (614268): [<00000000606c55c6>] __ieee80211wakequeue+0x933/0x985 softirqs last disabled at (614266): [<00000000606c52d6>] __ieee80211wakequeue+0x643/0x985

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38643.json"
}
References

Affected packages

Git / 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 Unknown introduced commit / All previous commits are affected
Last affected
2dbb6faebb94d6d5ae87e5ea6be9280c366393e1
Last affected
a4f85674e4693904ade7cbf6722d0d105d8062d8
Last affected
e233cbaf8ecc5859f0417dd53899da4edb477991

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38643.json"