CVE-2022-49313
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
drivers: usb: host: Fix deadlock in oxu_bus_suspend()
There is a deadlock in oxu_bus_suspend(), which is shown below:
(Thread 1) | (Thread 2) | timer_action() oxu_bus_suspend() | mod_timer() spin_lock_irq() //(1) | (wait a time) ... | oxu_watchdog() del_timer_sync() | spin_lock_irq() //(2) (wait timer to stop) | ...
We hold oxu->lock in position (1) of thread 1, and use del_timer_sync() to wait timer to stop, but timer handler also need oxu->lock in position (2) of thread 2. As a result, oxu_bus_suspend() will block forever.
Leer descripción completaMostrar menos
This patch extracts del_timer_sync() from the protection of spin_lock_irq(), which could let timer handler to obtain the needed lock.
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: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- 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
- CWE-667
Referencias
- https://git.kernel.org/stable/c/2dcec0bc142be2096af71a5703d63237127db204
- https://git.kernel.org/stable/c/4187b291a76664a3c03d3f0d9bfadc8322881868
- https://git.kernel.org/stable/c/4d378f2ae58138d4c55684e1d274e7dd94aa6524
- https://git.kernel.org/stable/c/9b58d255f27b0ed6a2e43208960864d67579db58
- https://git.kernel.org/stable/c/a3d380188bde8900c3f604e82b56572896499124
- https://git.kernel.org/stable/c/b97aae8b43b718314012e8170b7e03dbfd2e7677
- https://git.kernel.org/stable/c/d888753872190abd18f68a7d77b9c7c367f0a7ab
- https://git.kernel.org/stable/c/f8242044c91cafbba9e320b0fb31abf2429a3221
- https://git.kernel.org/stable/c/ffe9440d698274c6462d2e304562c6ddfc8c84df
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: usb: host: Fix deadlock in oxu_bus_suspend()\n\nThere is a deadlock in oxu_bus_suspend(), which is shown below:\n\n (Thread 1) | (Thread 2)\n | timer_action()\noxu_bus_suspend() | mod_timer()\n spin_lock_irq() //(1) | (wait a time)\n ... | oxu_watchdog()\n del_timer_sync() | spin_lock_irq() //(2)\n (wait timer to stop) | ...\n\nWe hold oxu->lock in position (1) of thread 1, and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need oxu->lock in position (2) of thread 2. As a result,\noxu_bus_suspend() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irq(), which could let timer handler to obtain\nthe needed lock."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drivers: usb: host: Corregir interbloqueo en oxu_bus_suspend() Hay un interbloqueo en oxu_bus_suspend(), que se muestra a continuación: (Hilo 1) | (Hilo 2) | timer_action() oxu_bus_suspend() | mod_timer() spin_lock_irq() //(1) | (esperar un tiempo) ... | oxu_watchdog() del_timer_sync() | spin_lock_irq() //(2) (esperar a que el temporizador se detenga) | ... Mantenemos oxu->lock en la posición (1) del hilo 1, y usamos del_timer_sync() para esperar a que el temporizador se detenga, pero el controlador del temporizador también necesita oxu->lock en la posición (2) del hilo 2. Como resultado, oxu_bus_suspend() se bloqueará para siempre. Este parche extrae del_timer_sync() de la protección de spin_lock_irq(), lo que podría permitir que el controlador del temporizador obtenga el bloqueo necesario."
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