CVE-2016-4557

Estado: ModificadaAlta (7.8)—Exploit

Gravedad7.8Alta · CVSS 3.1

Probabilidad de explotación10 %mayor que el 96 % de las CVE

Explotación activaNono figura en el catálogo de CISA

Exploit públicoDisponiblePublicado en Exploit-DB · Módulo de Metasploit (exploit fiable y al alcance de cualquiera)

La función replace_map_fd_with_map_ptr en kernel/bpf/verifier.c en el kernel de Linux en versiones anteriores a 4.5.5 no mantiene correctamente una estructura de datos fd, lo que permite a usuarios locales obtener privilegios o provocar una denegación de servicio (uso después de liberación de memoria) a través de instrucciones BPF manipuladas que hacen referencia a un archivo descriptor incorrecto.

CVSS

Puntuación base: 7.8
Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 10 %
Percentil entre todas las CVEs puntuadas: 96
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.

Módulo de Metasploit (exploit fiable y al alcance de cualquiera) · Linux BPF doubleput UAF Privilege Escalation
Publicado en Exploit-DB · Linux Kernel 4.4 (Ubuntu 16.04) - 'BPF' Local Privilege Escalation (Metasploit) (14/11/2016)
Publicado en Exploit-DB · Linux Kernel 4.4.x (Ubuntu 16.04) - 'double-fdput()' bpf(BPF_PROG_LOAD) Privilege Escalation (4/5/2016)

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-Other

Referencias

Mostrar las 18 referencias

JSON original (NVD)

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{
  "id": "CVE-2016-4557",
  "cveTags": [],
  "metrics": {
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          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
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          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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  "affected": [
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  "published": "2016-05-23T10:59:03.707",
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      "lang": "en",
      "value": "The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor."
    },
    {
      "lang": "es",
      "value": "La función replace_map_fd_with_map_ptr en kernel/bpf/verifier.c en el kernel de Linux en versiones anteriores a 4.5.5 no mantiene correctamente una estructura de datos fd, lo que permite a usuarios locales obtener privilegios o provocar una denegación de servicio (uso después de liberación de memoria) a través de instrucciones BPF manipuladas que hacen referencia a un archivo descriptor incorrecto."
    }
  ],
  "lastModified": "2026-06-17T00:47:46.807",
  "configurations": [
    {
      "nodes": [
        {
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          ],
          "operator": "OR"
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  ],
  "evaluatorComment": "CWE-416: Use After Free",
  "sourceIdentifier": "cve@mitre.org"
}