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CVE-2024-56662

Estado: ModificadaMedia (6)—

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

acpi: nfit: vmalloc-out-of-bounds Read in acpi_nfit_ctl

Fix an issue detected by syzbot with KASAN:

The issue occurs in cmd_to_func when the call_pkg->nd_reserved2 array is accessed without verifying that call_pkg points to a buffer that is appropriately sized as a struct nd_cmd_pkg. This can lead to out-of-bounds access and undefined behavior if the buffer does not have sufficient space.

To address this, a check was added in acpi_nfit_ctl() to ensure that buf is not NULL and that buf_len is less than sizeof(*call_pkg) before accessing it. This ensures safe access to the members of call_pkg, including the nd_reserved2 array.

Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: vmalloc-out-of-bounds in cmd_to_func drivers/acpi/nfit/
core.c:416 [inline]
BUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x20e8/0x24a0
drivers/acpi/nfit/core.c:459

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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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nacpi: nfit: vmalloc-out-of-bounds Read in acpi_nfit_ctl\n\nFix an issue detected by syzbot with KASAN:\n\nBUG: KASAN: vmalloc-out-of-bounds in cmd_to_func drivers/acpi/nfit/\ncore.c:416 [inline]\nBUG: KASAN: vmalloc-out-of-bounds in acpi_nfit_ctl+0x20e8/0x24a0\ndrivers/acpi/nfit/core.c:459\n\nThe issue occurs in cmd_to_func when the call_pkg->nd_reserved2\narray is accessed without verifying that call_pkg points to a buffer\nthat is appropriately sized as a struct nd_cmd_pkg. This can lead\nto out-of-bounds access and undefined behavior if the buffer does not\nhave sufficient space.\n\nTo address this, a check was added in acpi_nfit_ctl() to ensure that\nbuf is not NULL and that buf_len is less than sizeof(*call_pkg)\nbefore accessing it. This ensures safe access to the members of\ncall_pkg, including the nd_reserved2 array."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: acpi: nfit: vmalloc-out-of-bounds Lectura en acpi_nfit_ctl Se soluciona un problema detectado por syzbot con KASAN: ERROR: KASAN: vmalloc-out-of-bounds en cmd_to_func drivers/acpi/nfit/ core.c:416 [en línea] ERROR: KASAN: vmalloc-out-of-bounds en acpi_nfit_ctl+0x20e8/0x24a0 drivers/acpi/nfit/core.c:459 El problema ocurre en cmd_to_func cuando se accede a la matriz call_pkg->nd_reserved2 sin verificar que call_pkg apunte a un búfer que tenga el tamaño adecuado como una estructura nd_cmd_pkg. Esto puede provocar un acceso fuera de los límites y un comportamiento indefinido si el búfer no tiene suficiente espacio. Para solucionar este problema, se agregó una verificación en acpi_nfit_ctl() para garantizar que buf no sea NULL y que buf_len sea menor que sizeof(*call_pkg) antes de acceder a él. Esto garantiza un acceso seguro a los miembros de call_pkg, incluida la matriz nd_reserved2."
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