CVE-2023-53054
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
usb: dwc2: fix a devres leak in hw_enable upon suspend resume
Each time the platform goes to low power, PM suspend / resume routines call: __dwc2_lowlevel_hw_enable -> devm_add_action_or_reset(). This adds a new devres each time. This may also happen at runtime, as dwc2_lowlevel_hw_enable() can be called from udc_start().
This can be seen with tracing: - echo 1 > /sys/kernel/debug/tracing/events/dev/devres_log/enable - go to low power - cat /sys/kernel/debug/tracing/trace
A new "ADD" entry is found upon each low power cycle: ... devres_log: 49000000.usb-otg ADD 82a13bba devm_action_release (8 bytes) ... devres_log: 49000000.usb-otg ADD 49889daf devm_action_release (8 bytes) ...
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A second issue is addressed here: - regulator_bulk_enable() is called upon each PM cycle (suspend/resume). - regulator_bulk_disable() never gets called.
So the reference count for these regulators constantly increase, by one upon each low power cycle, due to missing regulator_bulk_disable() call in __dwc2_lowlevel_hw_disable().
The original fix that introduced the devm_add_action_or_reset() call, fixed an issue during probe, that happens due to other errors in dwc2_driver_probe() -> dwc2_core_reset(). Then the probe fails without disabling regulators, when dr_mode == USB_DR_MODE_PERIPHERAL.
Rather fix the error path: disable all the low level hardware in the error path, by using the "hsotg->ll_hw_enabled" flag. Checking dr_mode has been introduced to avoid a dual call to dwc2_lowlevel_hw_disable(). "ll_hw_enabled" should achieve the same (and is used currently in the remove() routine).
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-401
Referencias
- https://git.kernel.org/stable/c/1f01027c51eb16145e8e07fafea3ca07ef102d06
- https://git.kernel.org/stable/c/6485fc381b6528b6f547ee1ff10bdbcbe31a6e4c
- https://git.kernel.org/stable/c/cba76e1fb896b573f09f51aa299223276a77bc90
- https://git.kernel.org/stable/c/f747313249b74f323ddf841a9c8db14d989f296a
- https://git.kernel.org/stable/c/ffb8ab6f87bd28d700ab5c20d9d3a7e75067630d
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: fix a devres leak in hw_enable upon suspend resume\n\nEach time the platform goes to low power, PM suspend / resume routines\ncall: __dwc2_lowlevel_hw_enable -> devm_add_action_or_reset().\nThis adds a new devres each time.\nThis may also happen at runtime, as dwc2_lowlevel_hw_enable() can be\ncalled from udc_start().\n\nThis can be seen with tracing:\n- echo 1 > /sys/kernel/debug/tracing/events/dev/devres_log/enable\n- go to low power\n- cat /sys/kernel/debug/tracing/trace\n\nA new \"ADD\" entry is found upon each low power cycle:\n... devres_log: 49000000.usb-otg ADD 82a13bba devm_action_release (8 bytes)\n... devres_log: 49000000.usb-otg ADD 49889daf devm_action_release (8 bytes)\n...\n\nA second issue is addressed here:\n- regulator_bulk_enable() is called upon each PM cycle (suspend/resume).\n- regulator_bulk_disable() never gets called.\n\nSo the reference count for these regulators constantly increase, by one\nupon each low power cycle, due to missing regulator_bulk_disable() call\nin __dwc2_lowlevel_hw_disable().\n\nThe original fix that introduced the devm_add_action_or_reset() call,\nfixed an issue during probe, that happens due to other errors in\ndwc2_driver_probe() -> dwc2_core_reset(). Then the probe fails without\ndisabling regulators, when dr_mode == USB_DR_MODE_PERIPHERAL.\n\nRather fix the error path: disable all the low level hardware in the\nerror path, by using the \"hsotg->ll_hw_enabled\" flag. Checking dr_mode\nhas been introduced to avoid a dual call to dwc2_lowlevel_hw_disable().\n\"ll_hw_enabled\" should achieve the same (and is used currently in the\nremove() routine)."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: dwc2: se corrige una fuga de devres en hw_enable al reanudar la suspensión. Cada vez que la plataforma pasa a bajo consumo, las rutinas de suspensión/reinicio de PM llaman a __dwc2_lowlevel_hw_enable -> devm_add_action_or_reset(). Esto agrega un nuevo devres cada vez. Esto también puede ocurrir en tiempo de ejecución, ya que dwc2_lowlevel_hw_enable() puede llamarse desde udc_start(). Esto se puede ver con el seguimiento: - echo 1 > /sys/kernel/debug/tracing/events/dev/devres_log/enable - ir a bajo consumo - cat /sys/kernel/debug/tracing/trace Se encuentra una nueva entrada \"ADD\" en cada ciclo de bajo consumo: ... devres_log: 49000000.usb-otg ADD 82a13bba devm_action_release (8 bytes) ... devres_log: 49000000.usb-otg ADD 49889daf devm_action_release (8 bytes) ... Aquí se aborda un segundo problema: - regulator_bulk_enable() se llama en cada ciclo de PM (suspender/reanudar). - regulator_bulk_disable() nunca se llama. Por lo tanto, el recuento de referencias para estos reguladores aumenta constantemente, en uno con cada ciclo de bajo consumo, debido a la falta de la llamada a regulator_bulk_disable() en __dwc2_lowlevel_hw_disable(). La corrección original, que introdujo la llamada a devm_add_action_or_reset(), solucionó un problema durante el sondeo que se produce debido a otros errores en dwc2_driver_probe() -> dwc2_core_reset(). En ese caso, el sondeo falla sin deshabilitar los reguladores cuando dr_mode == USB_DR_MODE_PERIPHERAL. Mejor solución: deshabilite todo el hardware de bajo nivel en la ruta de error mediante el indicador \"hsotg->ll_hw_enabled\". Se ha introducido la comprobación de dr_mode para evitar una llamada dual a dwc2_lowlevel_hw_disable(). \"ll_hw_enabled\" debería lograr el mismo efecto (y se utiliza actualmente en la rutina remove())."
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"lastModified": "2026-06-17T06:44:12.470",
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