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CVE-2024-50288

Estado: ModificadaMedia (5.5)—

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

media: vivid: fix buffer overwrite when using > 32 buffers

The maximum number of buffers that can be requested was increased to 64 for the video capture queue. But video capture used a must_blank array that was still sized for 32 (VIDEO_MAX_FRAME). This caused an out-of-bounds write when using buffer indices >= 32.

Create a new define MAX_VID_CAP_BUFFERS that is used to access the must_blank array and set max_num_buffers for the video capture queue.

This solves a crash reported by:

Detalles técnicos trazas, registros y código del informe original
	https://bugzilla.kernel.org/show_bug.cgi?id=219258

CVSS

Probabilidad de explotación (EPSS)

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)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vivid: fix buffer overwrite when using > 32 buffers\n\nThe maximum number of buffers that can be requested was increased to\n64 for the video capture queue. But video capture used a must_blank\narray that was still sized for 32 (VIDEO_MAX_FRAME). This caused an\nout-of-bounds write when using buffer indices >= 32.\n\nCreate a new define MAX_VID_CAP_BUFFERS that is used to access the\nmust_blank array and set max_num_buffers for the video capture queue.\n\nThis solves a crash reported by:\n\n\thttps://bugzilla.kernel.org/show_bug.cgi?id=219258"
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: vivid: se corrige la sobrescritura de búfer al usar > 32 búferes. La cantidad máxima de búferes que se pueden solicitar se aumentó a 64 para la cola de captura de video. Pero la captura de video usó una matriz must_blank que todavía tenía un tamaño de 32 (VIDEO_MAX_FRAME). Esto provocó una escritura fuera de los límites cuando se usan índices de búfer >= 32. Cree una nueva definición MAX_VID_CAP_BUFFERS que se use para acceder a la matriz must_blank y establezca max_num_buffers para la cola de captura de video. Esto resuelve un bloqueo informado por: https://bugzilla.kernel.org/show_bug.cgi?id=219258"
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