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CVE-2021-31916

Estado: ModificadaMedia (6.7)—

Se encontró un fallo de escritura de la memoria fuera de límites (OOB) en la función list_devices en el archivo drivers/md/dm-ioctl.c en el módulo de controlador Multi-device en el kernel de Linux versiones anteriores a 5.12. Un fallo de comprobación limitada permite a un atacante con privilegios de usuario especial (CAP_SYS_ADMIN) conseguir acceso a la memoria fuera de límites, conllevando a un bloqueo del sistema o una filtración de información interna del kernel. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema

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 (3)

Debian — Debian LinuxLinux — Linux KernelRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:C",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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  "published": "2021-05-06T17:15:08.143",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-787"
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      "value": "An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability."
    },
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      "value": "Se encontró un fallo de escritura de la memoria fuera de límites (OOB) en la función list_devices en el archivo drivers/md/dm-ioctl.c en el módulo de controlador Multi-device en el kernel de Linux versiones anteriores a 5.12. Un fallo de comprobación limitada permite a un atacante con privilegios de usuario especial (CAP_SYS_ADMIN) conseguir acceso a la memoria fuera de límites, conllevando a un bloqueo del sistema o una filtración de información interna del kernel. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema"
    }
  ],
  "lastModified": "2026-06-17T03:52:29.103",
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