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CVE-2019-18885

Estado: ModificadaMedia (5.5)—PoC
Gravedad5.5Media · CVSS 3.1
Probabilidad de explotación1.22 %mayor que el 68 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoDisponiblePrueba de concepto en GitHub (no verificada)

El archivo fs/btrfs/volumes.c en el kernel de Linux versiones anteriores a la versión 5.1, permite una desreferencia del puntero NULL de la función btrfs_verify_dev_extents por medio de una imagen btrfs especialmente diseñada porque fs_devices-)devices es manejada inapropiadamente dentro de find_device, también se conoce como CID-09ba3bc9dd15.

CVSS

Puntuación base
5.5
Versión
3.1
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
1.22 %
Percentil entre todas las CVEs puntuadas
68
Fecha de la puntuación
20/10/2026

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).

Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

Mostrar las 24 referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2019-18885",
  "cveTags": [],
  "metrics": {
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          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
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  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
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  "descriptions": [
    {
      "lang": "en",
      "value": "fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka CID-09ba3bc9dd15."
    },
    {
      "lang": "es",
      "value": "El archivo fs/btrfs/volumes.c en el kernel de Linux versiones anteriores a la versión  5.1, permite una desreferencia del puntero NULL de la función btrfs_verify_dev_extents por medio de una imagen btrfs especialmente diseñada porque fs_devices-)devices es manejada inapropiadamente dentro de find_device, también se conoce como CID-09ba3bc9dd15."
    }
  ],
  "lastModified": "2026-06-17T02:25:31.530",
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}