CVE-2025-38643
Estado: ModificadaMedia (5.5)—
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:
Detalles técnicos trazas, registros y código del informe original
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
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-667
Referencias
- 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
- https://git.kernel.org/stable/c/defe9ce121160788547e8e6ec4438ad8a14f40dd
JSON original (NVD)
Mostrar
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"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-667"
}
]
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"descriptions": [
{
"lang": "en",
"value": "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"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: cfg80211: Se ha añadido un bloqueo faltante en cfg80211_check_and_end_cac(). Quienes llaman a wdev_chandef() deben mantener el mutex de wiphy. Sin embargo, el trabajador cfg80211_propagate_cac_done_wk() nunca asume el bloqueo. Lo que activa la advertencia a continuación con la prueba mesh_peer_connected_dfs de hostapd y los cambios de código mac80211 no publicados (aún): ADVERTENCIA: CPU: 0 PID: 495 en net/wireless/chan.c:1552 wdev_chandef+0x60/0x165 Módulos vinculados: CPU: 0 UID: 0 PID: 495 Comm: kworker/u4:2 No contaminado 6.14.0-rc5-wt-g03960e6f9d47 #33 13c287eeabfe1efea01c0bcc863723ab082e17cf Cola de trabajo: cfg80211 cfg80211_propagate_cac_done_wk Pila: 00000000 00000001 ffffff00 6093267c 00000000 6002ec30 6d577c50 60037608 00000000 67e8d108 6063717b 00000000 Rastreo de llamadas: [<6002ec30>] ? _printk+0x0/0x98 [<6003c2b3>] show_stack+0x10e/0x11a [<6002ec30>] ? _printk+0x0/0x98 [<60037608>] dump_stack_lvl+0x71/0xb8 [<6063717b>] ? __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>] proceso_trabajos_programados+0x3bc/0x60e [<6007d0ec>] ? mover_trabajos_vinculados+0x4d/0x81 [<6007d120>] ? asignar_trabajo+0x0/0xaa [<6007f81f>] subproceso_trabajador+0x220/0x2dc [<600786ef>] ? establecer_pf_trabajador+0x0/0x57 [<60087c96>] ? hilo_trabajador+0x0/0x2dc [<6006c05b>] ? calculate_sigpending+0x0/0x56 [<6003b37d>] new_thread_handler+0x4a/0x64 marca de evento de irq: 614611 hardirqs habilitados por última vez en (614621): [<00000000600bc96b>] __up_console_sem+0x82/0xaf hardirqs deshabilitados por última vez en (614630): [<00000000600bc92c>] __up_console_sem+0x43/0xaf softirqs habilitados por última vez en (614268): [<00000000606c55c6>] __ieee80211_wake_queue+0x933/0x985 softirqs deshabilitados por última vez en (614266): [<00000000606c52d6>] __ieee80211_wake_queue+0x643/0x985"
}
],
"lastModified": "2026-07-30T06:23:32.673",
"configurations": [
{
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{
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