CVE-2024-50269
Estado: ModificadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
usb: musb: sunxi: Fix accessing an released usb phy
Commit 6ed05c68cbca ("usb: musb: sunxi: Explicitly release USB PHY on exit") will cause that usb phy @glue->xceiv is accessed after released.
1) register platform driver @sunxi_musb_driver // get the usb phy @glue->xceiv sunxi_musb_probe() -> devm_usb_get_phy().
2) register and unregister platform driver @musb_driver musb_probe() -> sunxi_musb_init() use the phy here //the phy is released here musb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy()
3) register @musb_driver again musb_probe() -> sunxi_musb_init() use the phy here but the phy has been released at 2). ...
Leer descripción completaMostrar menos
Fixed by reverting the commit, namely, removing devm_usb_put_phy() from sunxi_musb_exit().
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: 0.27%
- Percentil entre todas las CVEs puntuadas: 18
- 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
T1059Command and Scripting Interpreterexecution60 %
CWE-416 (use-after-free) con AV:L y PR:L permite a atacante local con permisos bajos causar ejecución de código arbitrario o DoS mediante acceso a memoria liberada en el driver USB sunxi del kernel.
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-416
- CWE-416
Referencias
- https://git.kernel.org/stable/c/498dbd9aea205db9da674994b74c7bf8e18448bd
- https://git.kernel.org/stable/c/4aa77d5ea9944468e16c3eed15e858fd5de44de1
- https://git.kernel.org/stable/c/63559ba8077cbadae1c92a65b73ea522bf377dd9
- https://git.kernel.org/stable/c/6e2848d1c8c0139161e69ac0a94133e90e9988e8
- https://git.kernel.org/stable/c/721ddad945596220c123eb6f7126729fe277ee4f
- https://git.kernel.org/stable/c/8a30da5aa9609663b3e05bcc91a916537f66a4cd
- https://git.kernel.org/stable/c/b08baa75b989cf779cbfa0969681f8ba2dc46569
- https://git.kernel.org/stable/c/ccd811c304d2ee56189bfbc49302cb3c44361893
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
JSON original (NVD)
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: musb: sunxi: Fix accessing an released usb phy\n\nCommit 6ed05c68cbca (\"usb: musb: sunxi: Explicitly release USB PHY on\nexit\") will cause that usb phy @glue->xceiv is accessed after released.\n\n1) register platform driver @sunxi_musb_driver\n// get the usb phy @glue->xceiv\nsunxi_musb_probe() -> devm_usb_get_phy().\n\n2) register and unregister platform driver @musb_driver\nmusb_probe() -> sunxi_musb_init()\nuse the phy here\n//the phy is released here\nmusb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy()\n\n3) register @musb_driver again\nmusb_probe() -> sunxi_musb_init()\nuse the phy here but the phy has been released at 2).\n...\n\nFixed by reverting the commit, namely, removing devm_usb_put_phy()\nfrom sunxi_musb_exit()."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: musb: sunxi: Se solucionó el acceso a un usb phy liberado. Commit 6ed05c68cbca (\"usb: musb: sunxi: Liberar explícitamente USB PHY al salir\") provocará que se acceda al usb phy @glue->xceiv después de su liberación. 1) registrar el controlador de la plataforma @sunxi_musb_driver // obtener el usb phy @glue->xceiv sunxi_musb_probe() -> devm_usb_get_phy(). 2) registrar y anular el registro del controlador de la plataforma @musb_driver musb_probe() -> sunxi_musb_init() usa el phy aquí //el phy se publica aquí musb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy() 3) registrar @musb_driver nuevamente musb_probe() -> sunxi_musb_init() usa el phy aquí pero el phy se ha publicado en 2). ... Se solucionó revirtiendo el commit, es decir, eliminando devm_usb_put_phy() de sunxi_musb_exit()."
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