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CVE-2025-21808

Estado: ModificadaMedia (5.5)—

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

net: xdp: Disallow attaching device-bound programs in generic mode

Device-bound programs are used to support RX metadata kfuncs. These kfuncs are driver-specific and rely on the driver context to read the metadata. This means they can't work in generic XDP mode. However, there is no check to disallow such programs from being attached in generic mode, in which case the metadata kfuncs will be called in an invalid context, leading to crashes.

Fix this by adding a check to disallow attaching device-bound programs in generic mode.

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)

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  "published": "2025-02-27T20:16:03.410",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xdp: Disallow attaching device-bound programs in generic mode\n\nDevice-bound programs are used to support RX metadata kfuncs. These\nkfuncs are driver-specific and rely on the driver context to read the\nmetadata. This means they can't work in generic XDP mode. However, there\nis no check to disallow such programs from being attached in generic\nmode, in which case the metadata kfuncs will be called in an invalid\ncontext, leading to crashes.\n\nFix this by adding a check to disallow attaching device-bound programs\nin generic mode."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: xdp: No permitir adjuntar programas vinculados al dispositivo en modo genérico Los programas vinculados al dispositivo se utilizan para admitir las kfuncs de metadatos RX. Estas kfuncs son específicas del controlador y dependen del contexto del controlador para leer los metadatos. Esto significa que no pueden funcionar en modo XDP genérico. Sin embargo, no hay ninguna verificación para no permitir que dichos programas se adjunten en modo genérico, en cuyo caso las kfuncs de metadatos se llamarán en un contexto no válido, lo que provocará fallas. Solucione esto agregando una verificación para no permitir adjuntar programas vinculados al dispositivo en modo genérico."
    }
  ],
  "lastModified": "2026-07-30T06:21:38.247",
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