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CVE-2021-47348

Estado: AnalizadaCrítica (9.1)—
Gravedad9.1Crítica · CVSS 3.1
Probabilidad de explotación0.99 %mayor que el 62 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amd/display: evita la sobrelectura y la corrupción de HDCP. En lugar de leer los 5 bytes deseados del campo de destino real, el código leía 8. Esto podría resultar en un archivo dañado. valor si los 3 bytes finales fueran distintos de cero, por lo tanto, utilice un búfer de rebote de tamaño adecuado e inicializado en cero, y lea solo 5 bytes antes de convertir a u64.

CVSS

Puntuación base
9.1
Versión
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
0.99 %
Percentil entre todas las CVEs puntuadas
62
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 8 referencias

JSON original (NVD)

Mostrar
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      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Avoid HDCP over-read and corruption\n\nInstead of reading the desired 5 bytes of the actual target field,\nthe code was reading 8. This could result in a corrupted value if the\ntrailing 3 bytes were non-zero, so instead use an appropriately sized\nand zero-initialized bounce buffer, and read only 5 bytes before casting\nto u64."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amd/display: evita la sobrelectura y la corrupción de HDCP. En lugar de leer los 5 bytes deseados del campo de destino real, el código leía 8. Esto podría resultar en un archivo dañado. valor si los 3 bytes finales fueran distintos de cero, por lo tanto, utilice un búfer de rebote de tamaño adecuado e inicializado en cero, y lea solo 5 bytes antes de convertir a u64."
    }
  ],
  "lastModified": "2026-06-17T04:17:15.570",
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    {
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        {
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}