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CVE-2020-27672

Estado: ModificadaAlta (7)—

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.

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 (4)

Debian — Debian LinuxFedoraproject — FedoraOpensuse — LeapXEN — XEN

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-27672",
  "cveTags": [],
  "metrics": {
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          "baseScore": 6.9,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-362"
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          "lang": "en",
          "value": "CWE-416"
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      "lang": "en",
      "value": "An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en Xen versiones hasta 4.14.x, permitiendo a usuarios del SO invitado x86 causar una denegación de servicio del SO host, lograr una corrupción de datos o posiblemente alcanzar privilegios mediante la explotación de una condición de carrera que conlleva a un uso de la memoria previamente liberada involucrando a superpáginas de 2MiB y 1GiB"
    }
  ],
  "lastModified": "2026-06-17T03:09:28.463",
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