CVE-2025-38391

Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
usb: typec: altmodes/displayport: do not index invalid pin_assignments
A poorly implemented DisplayPort Alt Mode port partner can indicate that its pin assignment capabilities are greater than the maximum value, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show will cause a BRK exception due to an out of bounds array access.
Prevent for loop in pin_assignment_show from accessing invalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX value in typec_dp.h and using i < DP_PIN_ASSIGN_MAX as a loop condition.
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: 0.18%
Percentil entre todas las CVEs puntuadas: 7
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 (2)

Debian — Debian Linux Linux — Linux Kernel
CWE

CWE-125
Referencias

JSON original (NVD)

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          "value": "CWE-125"
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: do not index invalid pin_assignments\n\nA poorly implemented DisplayPort Alt Mode port partner can indicate\nthat its pin assignment capabilities are greater than the maximum\nvalue, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show\nwill cause a BRK exception due to an out of bounds array access.\n\nPrevent for loop in pin_assignment_show from accessing\ninvalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX\nvalue in typec_dp.h and using i < DP_PIN_ASSIGN_MAX as a loop\ncondition."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: typec: altmodes/displayport: no indexar asignaciones de pines no válidas. Un puerto asociado DisplayPort en modo alternativo mal implementado puede indicar que su capacidad de asignación de pines supera el valor máximo, DP_PIN_ASSIGN_F. En este caso, las llamadas a pin_assignment_show provocarán una excepción BRK debido a un acceso fuera de los límites de la matriz. Para evitar que el bucle for de pin_assignment_show acceda a valores no válidos en las asignaciones de pines, agregue el valor DP_PIN_ASSIGN_MAX en typec_dp.h y use i &lt; DP_PIN_ASSIGN_MAX como condición de bucle."
    }
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