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CVE-2021-20261

Estado: ModificadaMedia (6.4)—

Se encontró una condición de carrera en la implementación del kernel de Linux del software manejador del controlador de la unidad de disquete. El impacto de este problema es reducido por el hecho de que los permisos predeterminados en el dispositivo de disquete (/dev/fd0) están restringidos para root. Si los permisos en el dispositivo han cambiado, el impacto cambia mucho. En la configuración predeterminada, son requeridos permisos de root (o equivalentes) para atacar este fallo

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 (2)

Linux — Linux KernelRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-20261",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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          "privilegesRequired": "HIGH",
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  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "kernel",
          "versions": [
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              "status": "affected",
              "version": "kernel 5.12-rc2"
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  "published": "2021-03-11T21:15:11.983",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
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          "lang": "en",
          "value": "CWE-362"
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  "descriptions": [
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      "lang": "en",
      "value": "A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the floppy device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw."
    },
    {
      "lang": "es",
      "value": "Se encontró una condición de carrera en la implementación del kernel de Linux del software manejador del controlador de la unidad de disquete. El impacto de este problema es reducido por el hecho de que los permisos predeterminados en el dispositivo de disquete (/dev/fd0) están restringidos para root. Si los permisos en el dispositivo han cambiado, el impacto cambia mucho. En la configuración predeterminada, son requeridos permisos de root (o equivalentes) para atacar este fallo"
    }
  ],
  "lastModified": "2026-06-17T03:33:33.773",
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