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CVE-2024-47705

Estado: ModificadaMedia (5.5)—

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

block: fix potential invalid pointer dereference in blk_add_partition

The blk_add_partition() function initially used a single if-condition (IS_ERR(part)) to check for errors when adding a partition. This was modified to handle the specific case of -ENXIO separately, allowing the function to proceed without logging the error in this case. However, this change unintentionally left a path where md_autodetect_dev() could be called without confirming that part is a valid pointer.

This commit separates the error handling logic by splitting the initial if-condition, improving code readability and handling specific error scenarios explicitly.

Leer descripción completaMostrar menos

The function now distinguishes the general error case from -ENXIO without altering the existing behavior of md_autodetect_dev() calls.

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)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix potential invalid pointer dereference in blk_add_partition\n\nThe blk_add_partition() function initially used a single if-condition\n(IS_ERR(part)) to check for errors when adding a partition. This was\nmodified to handle the specific case of -ENXIO separately, allowing the\nfunction to proceed without logging the error in this case. However,\nthis change unintentionally left a path where md_autodetect_dev()\ncould be called without confirming that part is a valid pointer.\n\nThis commit separates the error handling logic by splitting the\ninitial if-condition, improving code readability and handling specific\nerror scenarios explicitly. The function now distinguishes the general\nerror case from -ENXIO without altering the existing behavior of\nmd_autodetect_dev() calls."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: fix potential no valid pointer dereference in blk_add_partition La función blk_add_partition() inicialmente usaba una sola condición if (IS_ERR(part)) para verificar errores al agregar una partición. Esto se modificó para manejar el caso específico de -ENXIO por separado, lo que permite que la función continúe sin registrar el error en este caso. Sin embargo, este cambio dejó involuntariamente una ruta donde se podía llamar a md_autodetect_dev() sin confirmar que part es un puntero válido. Esta confirmación separa la lógica de manejo de errores al dividir la condición if inicial, lo que mejora la legibilidad del código y maneja escenarios de error específicos de manera explícita. La función ahora distingue el caso de error general de -ENXIO sin alterar el comportamiento existente de las llamadas a md_autodetect_dev()."
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