CVE-2024-26814

Estado: AnalizadaMedia (5.5)—

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: vfio/fsl-mc: Bloquear el controlador de interrupciones de llamada sin disparador. El puntero de disparo eventfd_ctx del objeto vfio_fsl_mc_irq es inicialmente NULL y puede convertirse en NULL si el usuario establece el disparador eventfd en -1. El propio controlador de interrupciones garantiza que el disparador siempre será válido entre request_irq() y free_irq(), pero los mecanismos de prueba de bucle invertido para invocar la función del controlador deben probar el disparador.

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Las rutas de activación y configuración de ioctl utilizan igate y, por lo tanto, son mutuamente excluyentes. El controlador vfio-fsl-mc no utiliza irqfds ni admite ningún tipo de operación de enmascaramiento; por lo tanto, a diferencia de vfio-pci y vfio-platform, el flujo puede permanecer esencialmente sin cambios.

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: 0.22%
Percentil entre todas las CVEs puntuadas: 12
Fecha de la puntuación: 8/10/2026

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-476

Referencias

JSON original (NVD)

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/fsl-mc: Block calling interrupt handler without trigger\n\nThe eventfd_ctx trigger pointer of the vfio_fsl_mc_irq object is\ninitially NULL and may become NULL if the user sets the trigger\neventfd to -1.  The interrupt handler itself is guaranteed that\ntrigger is always valid between request_irq() and free_irq(), but\nthe loopback testing mechanisms to invoke the handler function\nneed to test the trigger.  The triggering and setting ioctl paths\nboth make use of igate and are therefore mutually exclusive.\n\nThe vfio-fsl-mc driver does not make use of irqfds, nor does it\nsupport any sort of masking operations, therefore unlike vfio-pci\nand vfio-platform, the flow can remain essentially unchanged."
    },
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      "value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: vfio/fsl-mc: Bloquear el controlador de interrupciones de llamada sin disparador. El puntero de disparo eventfd_ctx del objeto vfio_fsl_mc_irq es inicialmente NULL y puede convertirse en NULL si el usuario establece el disparador eventfd en -1. El propio controlador de interrupciones garantiza que el disparador siempre será válido entre request_irq() y free_irq(), pero los mecanismos de prueba de bucle invertido para invocar la función del controlador deben probar el disparador. Las rutas de activación y configuración de ioctl utilizan igate y, por lo tanto, son mutuamente excluyentes. El controlador vfio-fsl-mc no utiliza irqfds ni admite ningún tipo de operación de enmascaramiento; por lo tanto, a diferencia de vfio-pci y vfio-platform, el flujo puede permanecer esencialmente sin cambios."
    }
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