CVE-2022-49524

Estado: AnalizadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

media: pci: cx23885: Fix the error handling in cx23885_initdev()

When the driver fails to call the dma_set_mask(), the driver will get the following splat:

This is because the driver has initialized the i2c related resources in cx23885_dev_setup() but not released them in error handling, fix this bug by modifying the error path that jumps after failing to call the dma_set_mask().

Detalles técnicos trazas, registros y código del informe original

[   55.853884] BUG: KASAN: use-after-free in __process_removed_driver+0x3c/0x240
[   55.854486] Read of size 8 at addr ffff88810de60408 by task modprobe/590
[   55.856822] Call Trace:
[   55.860327]  __process_removed_driver+0x3c/0x240
[   55.861347]  bus_for_each_dev+0x102/0x160
[   55.861681]  i2c_del_driver+0x2f/0x50

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: 17
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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %

Vulnerabilidad use-after-free (CWE-416) en controlador Linux con acceso local sin interacción (AV:L, PR:L, UI:N). Permite escalada de privilegios e inyección de código en 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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

Mostrar

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pci: cx23885: Fix the error handling in cx23885_initdev()\n\nWhen the driver fails to call the dma_set_mask(), the driver will get\nthe following splat:\n\n[   55.853884] BUG: KASAN: use-after-free in __process_removed_driver+0x3c/0x240\n[   55.854486] Read of size 8 at addr ffff88810de60408 by task modprobe/590\n[   55.856822] Call Trace:\n[   55.860327]  __process_removed_driver+0x3c/0x240\n[   55.861347]  bus_for_each_dev+0x102/0x160\n[   55.861681]  i2c_del_driver+0x2f/0x50\n\nThis is because the driver has initialized the i2c related resources\nin cx23885_dev_setup() but not released them in error handling, fix this\nbug by modifying the error path that jumps after failing to call the\ndma_set_mask()."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: pci: cx23885: Se corrige la gestión de errores en cx23885_initdev() Cuando el controlador no puede llamar a dma_set_mask(), el controlador obtendrá el siguiente mensaje: [ 55.853884] ERROR: KASAN: use-after-free en __process_removed_driver+0x3c/0x240 [ 55.854486] Lectura de tamaño 8 en la dirección ffff88810de60408 por la tarea modprobe/590 [ 55.856822] Seguimiento de llamadas: [ 55.860327] __process_removed_driver+0x3c/0x240 [ 55.861347] bus_for_each_dev+0x102/0x160 [ 55.861681] i2c_del_driver+0x2f/0x50 Esto se debe a que el controlador ha inicializado los recursos relacionados con i2c en cx23885_dev_setup() pero no los liberó en la gestión de errores; corrija este error modificando la ruta de error que salta después de no poder llamar a dma_set_mask()."
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