CVE-2022-49519
Estado: ModificadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
ath10k: skip ath10k_halt during suspend for driver state RESTARTING
Double free crash is observed when FW recovery(caused by wmi timeout/crash) is followed by immediate suspend event. The FW recovery is triggered by ath10k_core_restart() which calls driver clean up via ath10k_halt(). When the suspend event occurs between the FW recovery, the restart worker thread is put into frozen state until suspend completes. The suspend event triggers ath10k_stop() which again triggers ath10k_halt() The double invocation of ath10k_halt() causes ath10k_htt_rx_free() to be called twice(Note: ath10k_htt_rx_alloc was not called by restart worker thread because of its frozen state), causing the crash.
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To fix this, during the suspend flow, skip call to ath10k_halt() in ath10k_stop() when the current driver state is ATH10K_STATE_RESTARTING. Also, for driver state ATH10K_STATE_RESTARTING, call ath10k_wait_for_suspend() in ath10k_stop(). This is because call to ath10k_wait_for_suspend() is skipped later in [ath10k_halt() > ath10k_core_stop()] for the driver state ATH10K_STATE_RESTARTING.
The frozen restart worker thread will be cancelled during resume when the device comes out of suspend.
Below is the crash stack for reference:
Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00288-QCARMSWPZ-1
Detalles técnicos trazas, registros y código del informe original
[ 428.469167] ------------[ cut here ]------------ [ 428.469180] kernel BUG at mm/slub.c:4150! [ 428.469193] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 428.469219] Workqueue: events_unbound async_run_entry_fn [ 428.469230] RIP: 0010:kfree+0x319/0x31b [ 428.469241] RSP: 0018:ffffa1fac015fc30 EFLAGS: 00010246 [ 428.469247] RAX: ffffedb10419d108 RBX: ffff8c05262b0000 [ 428.469252] RDX: ffff8c04a8c07000 RSI: 0000000000000000 [ 428.469256] RBP: ffffa1fac015fc78 R08: 0000000000000000 [ 428.469276] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 428.469285] Call Trace: [ 428.469295] ? dma_free_attrs+0x5f/0x7d [ 428.469320] ath10k_core_stop+0x5b/0x6f [ 428.469336] ath10k_halt+0x126/0x177 [ 428.469352] ath10k_stop+0x41/0x7e [ 428.469387] drv_stop+0x88/0x10e [ 428.469410] __ieee80211_suspend+0x297/0x411 [ 428.469441] rdev_suspend+0x6e/0xd0 [ 428.469462] wiphy_suspend+0xb1/0x105 [ 428.469483] ? name_show+0x2d/0x2d [ 428.469490] dpm_run_callback+0x8c/0x126 [ 428.469511] ? name_show+0x2d/0x2d [ 428.469517] __device_suspend+0x2e7/0x41b [ 428.469523] async_suspend+0x1f/0x93 [ 428.469529] async_run_entry_fn+0x3d/0xd1 [ 428.469535] process_one_work+0x1b1/0x329 [ 428.469541] worker_thread+0x213/0x372 [ 428.469547] kthread+0x150/0x15f [ 428.469552] ? pr_cont_work+0x58/0x58 [ 428.469558] ? kthread_blkcg+0x31/0x31
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.35%
- Percentil entre todas las CVEs puntuadas: 26
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto principal
T1499.004Application or System Exploitationimpact65 %
Vulnerabilidad de use-after-free (CWE-415) en controlador ath10k que causa doble liberación de memoria (double free) durante recuperación de firmware seguida de suspensión. Requiere acceso local (AV:L, PR:L) sin interacción. El impacto es negación de servicio mediante crash del kernel (T1499.004).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-415
Referencias
- https://git.kernel.org/stable/c/5321e5211b5dc873e2e3d0deb749e69ecf4dbfe5
- https://git.kernel.org/stable/c/7eb14cb604f49e58b7cf6faa87961a865a3c8649
- https://git.kernel.org/stable/c/8aa3750986ffcf73e0692db3b40dd3a8e8c0c575
- https://git.kernel.org/stable/c/b72a4aff947ba807177bdabb43debaf2c66bee05
- https://git.kernel.org/stable/c/c2272428090d0d215a3f017cbbbad731c07eee53
JSON original (NVD)
Mostrar
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"descriptions": [
{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nath10k: skip ath10k_halt during suspend for driver state RESTARTING\n\nDouble free crash is observed when FW recovery(caused by wmi\ntimeout/crash) is followed by immediate suspend event. The FW recovery\nis triggered by ath10k_core_restart() which calls driver clean up via\nath10k_halt(). When the suspend event occurs between the FW recovery,\nthe restart worker thread is put into frozen state until suspend completes.\nThe suspend event triggers ath10k_stop() which again triggers ath10k_halt()\nThe double invocation of ath10k_halt() causes ath10k_htt_rx_free() to be\ncalled twice(Note: ath10k_htt_rx_alloc was not called by restart worker\nthread because of its frozen state), causing the crash.\n\nTo fix this, during the suspend flow, skip call to ath10k_halt() in\nath10k_stop() when the current driver state is ATH10K_STATE_RESTARTING.\nAlso, for driver state ATH10K_STATE_RESTARTING, call\nath10k_wait_for_suspend() in ath10k_stop(). This is because call to\nath10k_wait_for_suspend() is skipped later in\n[ath10k_halt() > ath10k_core_stop()] for the driver state\nATH10K_STATE_RESTARTING.\n\nThe frozen restart worker thread will be cancelled during resume when the\ndevice comes out of suspend.\n\nBelow is the crash stack for reference:\n\n[ 428.469167] ------------[ cut here ]------------\n[ 428.469180] kernel BUG at mm/slub.c:4150!\n[ 428.469193] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n[ 428.469219] Workqueue: events_unbound async_run_entry_fn\n[ 428.469230] RIP: 0010:kfree+0x319/0x31b\n[ 428.469241] RSP: 0018:ffffa1fac015fc30 EFLAGS: 00010246\n[ 428.469247] RAX: ffffedb10419d108 RBX: ffff8c05262b0000\n[ 428.469252] RDX: ffff8c04a8c07000 RSI: 0000000000000000\n[ 428.469256] RBP: ffffa1fac015fc78 R08: 0000000000000000\n[ 428.469276] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 428.469285] Call Trace:\n[ 428.469295] ? dma_free_attrs+0x5f/0x7d\n[ 428.469320] ath10k_core_stop+0x5b/0x6f\n[ 428.469336] ath10k_halt+0x126/0x177\n[ 428.469352] ath10k_stop+0x41/0x7e\n[ 428.469387] drv_stop+0x88/0x10e\n[ 428.469410] __ieee80211_suspend+0x297/0x411\n[ 428.469441] rdev_suspend+0x6e/0xd0\n[ 428.469462] wiphy_suspend+0xb1/0x105\n[ 428.469483] ? name_show+0x2d/0x2d\n[ 428.469490] dpm_run_callback+0x8c/0x126\n[ 428.469511] ? name_show+0x2d/0x2d\n[ 428.469517] __device_suspend+0x2e7/0x41b\n[ 428.469523] async_suspend+0x1f/0x93\n[ 428.469529] async_run_entry_fn+0x3d/0xd1\n[ 428.469535] process_one_work+0x1b1/0x329\n[ 428.469541] worker_thread+0x213/0x372\n[ 428.469547] kthread+0x150/0x15f\n[ 428.469552] ? pr_cont_work+0x58/0x58\n[ 428.469558] ? kthread_blkcg+0x31/0x31\n\nTested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00288-QCARMSWPZ-1"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ath10k: omitir ath10k_halt durante la suspensión para el estado del controlador REINICIO Se observa un doble bloqueo libre cuando la recuperación de FW (causada por el tiempo de espera/bloqueo de wmi) es seguida por un evento de suspensión inmediata. La recuperación de FW es activada por ath10k_core_restart() que llama a la limpieza del controlador a través de ath10k_halt(). Cuando el evento de suspensión ocurre entre la recuperación de FW, el hilo de trabajo de reinicio se pone en estado congelado hasta que se completa la suspensión. El evento de suspensión activa ath10k_stop() que nuevamente activa ath10k_halt() La doble invocación de ath10k_halt() hace que ath10k_htt_rx_free() se llame dos veces (Nota: ath10k_htt_rx_alloc no fue llamado por el hilo de trabajo de reinicio debido a su estado congelado), lo que causa el bloqueo. Para solucionar esto, durante el flujo de suspensión, omite la llamada a ath10k_halt() en ath10k_stop() cuando el estado actual del controlador sea ATH10K_STATE_RESTARTING. Además, para el estado del controlador ATH10K_STATE_RESTARTING, llama a ath10k_wait_for_suspend() en ath10k_stop(). Esto se debe a que la llamada a ath10k_wait_for_suspend() se omite más adelante en [ath10k_halt() > ath10k_core_stop()] para el estado del controlador ATH10K_STATE_RESTARTING. El hilo de trabajo de reinicio congelado se cancelará durante la reanudación cuando el dispositivo salga de la suspensión. A continuación se muestra la pila de fallas como referencia: [ 428.469167] ------------[ cortar aquí ]------------ [ 428.469180] kernel BUG at mm/slub.c:4150! [ 428.469193] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 428.469219] Workqueue: events_unbound async_run_entry_fn [ 428.469230] RIP: 0010:kfree+0x319/0x31b [ 428.469241] RSP: 0018:ffffa1fac015fc30 EFLAGS: 00010246 [ 428.469247] RAX: ffffedb10419d108 RBX: ffff8c05262b0000 [ 428.469252] RDX: ffff8c04a8c07000 RSI: 0000000000000000 [ 428.469256] RBP: ffffa1fac015fc78 R08: 0000000000000000 [ 428.469276] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 428.469285] Call Trace: [ 428.469295] ? dma_free_attrs+0x5f/0x7d [ 428.469320] ath10k_core_stop+0x5b/0x6f [ 428.469336] ath10k_halt+0x126/0x177 [ 428.469352] ath10k_stop+0x41/0x7e [ 428.469387] drv_stop+0x88/0x10e [ 428.469410] __ieee80211_suspend+0x297/0x411 [ 428.469441] rdev_suspend+0x6e/0xd0 [ 428.469462] wiphy_suspend+0xb1/0x105 [ 428.469483] ? name_show+0x2d/0x2d [ 428.469490] dpm_run_callback+0x8c/0x126 [ 428.469511] ? name_show+0x2d/0x2d [ 428.469517] __device_suspend+0x2e7/0x41b [ 428.469523] async_suspend+0x1f/0x93 [ 428.469529] async_run_entry_fn+0x3d/0xd1 [ 428.469535] process_one_work+0x1b1/0x329 [ 428.469541] worker_thread+0x213/0x372 [ 428.469547] kthread+0x150/0x15f [ 428.469552] ? pr_cont_work+0x58/0x58 [ 428.469558] ? kthread_blkcg+0x31/0x31 Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00288-QCARMSWPZ-1 "
}
],
"lastModified": "2026-08-15T13:17:23.600",
"configurations": [
{
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