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CVE-2024-56745

Estado: ModificadaMedia (5.5)—

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

PCI: Fix reset_method_store() memory leak

In reset_method_store(), a string is allocated via kstrndup() and assigned to the local "options". options is then used in with strsep() to find spaces:

If there are no remaining spaces, then options is set to NULL by strsep(), so the subsequent kfree(options) doesn't free the memory allocated via kstrndup().

Fix by using a separate tmp_options to iterate with strsep() so options is preserved.

Detalles técnicos trazas, registros y código del informe original
  while ((name = strsep(&options, " ")) != NULL) {

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\nPCI: Fix reset_method_store() memory leak\n\nIn reset_method_store(), a string is allocated via kstrndup() and assigned\nto the local \"options\". options is then used in with strsep() to find\nspaces:\n\n  while ((name = strsep(&options, \" \")) != NULL) {\n\nIf there are no remaining spaces, then options is set to NULL by strsep(),\nso the subsequent kfree(options) doesn't free the memory allocated via\nkstrndup().\n\nFix by using a separate tmp_options to iterate with strsep() so options is\npreserved."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: Corregir pérdida de memoria de reset_method_store() En reset_method_store(), se asigna una cadena a través de kstrndup() y se asigna a las \"opciones\" locales. Luego, se usa options con strsep() para buscar espacios: while ((name = strsep(&options, \" \")) != NULL) { Si no quedan espacios, strsep() establece options en NULL, por lo que el kfree(options) posterior no libera la memoria asignada a través de kstrndup(). Se soluciona utilizando un tmp_options separado para iterar con strsep() de modo que se preserve options."
    }
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