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CVE-2024-39462

Estado: AnalizadaCrítica (9.8)—
Gravedad9.8Crítica · CVSS 3.1
Probabilidad de explotación0.77 %mayor que el 55 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") anotó el miembro hws de 'struct clk_hw_onecell_data' con __counted_by, que informa al sanitizante de los límites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los límites.

Leer descripción completaMostrar menos

Como se señaló en ese cambio, el miembro __counted_by debe inicializarse con la cantidad de elementos antes de que ocurra el primer acceso a la matriz; de lo contrario, habrá una advertencia de cada acceso antes de la inicialización porque la cantidad de elementos es cero. Esto ocurre en clk_dvp_probe() debido a que ->num se asigna después de que se haya accedido a ->hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 El índice 0 está fuera del rango para el tipo 'struct clk_hw *[] __counted_by(num)' (también conocido como 'struct clk_hw *[]'). Mueva la inicialización ->num antes del primer acceso de ->hws, lo que borra la advertencia. .

CVSS

Puntuación base
9.8
Versión
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
0.77 %
Percentil entre todas las CVEs puntuadas
55
Fecha de la puntuación
21/10/2026

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 (1)

Linux — Linux Kernel

CWE

Referencias

Mostrar las 6 referencias

JSON original (NVD)

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  "id": "CVE-2024-39462",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: bcm: dvp: Assign ->num before accessing ->hws\n\nCommit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with\n__counted_by\") annotated the hws member of 'struct clk_hw_onecell_data'\nwith __counted_by, which informs the bounds sanitizer about the number\nof elements in hws, so that it can warn when hws is accessed out of\nbounds. As noted in that change, the __counted_by member must be\ninitialized with the number of elements before the first array access\nhappens, otherwise there will be a warning from each access prior to the\ninitialization because the number of elements is zero. This occurs in\nclk_dvp_probe() due to ->num being assigned after ->hws has been\naccessed:\n\n  UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2\n  index 0 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]')\n\nMove the ->num initialization to before the first access of ->hws, which\nclears up the warning."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with __counted_by\") anotó el miembro hws de 'struct clk_hw_onecell_data' con __counted_by, que informa al sanitizante de los límites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los límites. Como se señaló en ese cambio, el miembro __counted_by debe inicializarse con la cantidad de elementos antes de que ocurra el primer acceso a la matriz; de lo contrario, habrá una advertencia de cada acceso antes de la inicialización porque la cantidad de elementos es cero. Esto ocurre en clk_dvp_probe() debido a que ->num se asigna después de que se haya accedido a ->hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 El índice 0 está fuera del rango para el tipo 'struct clk_hw *[] __counted_by(num)' (también conocido como 'struct clk_hw *[]'). Mueva la inicialización ->num antes del primer acceso de ->hws, lo que borra la advertencia. ."
    }
  ],
  "lastModified": "2026-06-17T07:41:57.760",
  "configurations": [
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      "nodes": [
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