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CVE-2020-2732

Estado: ModificadaMedia (6.8)—

Se detectó un fallo en la manera en que el hipervisor de KVM manejó la emulación de instrucciones para un invitado L2 cuando la virtualización anidada está habilitada. En algunas circunstancias, un invitado L2 puede engañar al invitado L0 para que acceda a recursos L1 confidenciales que deberían estar inaccesibles para el invitado L2.

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)

Redhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-2732",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-2732",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-30T15:00:48.809812Z"
        }
      }
    ],
    "cvssMetricV2": [
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        "type": "Primary",
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        "cvssData": {
          "version": "2.0",
          "baseScore": 2.3,
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          "vectorString": "AV:A/AC:M/Au:S/C:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.4,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
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        "cvssData": {
          "scope": "CHANGED",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
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          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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          "integrityImpact": "NONE",
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          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 2.3
      }
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  },
  "affected": [
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      "affectedData": [
        {
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          "product": "Oracle Linux",
          "versions": [
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              "version": "7"
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  "published": "2020-04-08T22:15:12.263",
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        "Patch",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest."
    },
    {
      "lang": "es",
      "value": "Se detectó un fallo en la manera en que el hipervisor de KVM manejó la emulación de instrucciones para un invitado L2 cuando la virtualización anidada está habilitada. En algunas circunstancias, un invitado L2 puede engañar al invitado L0 para que acceda a recursos L1 confidenciales que deberían estar inaccesibles para el invitado L2."
    }
  ],
  "lastModified": "2026-06-17T03:12:46.813",
  "configurations": [
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      "nodes": [
        {
          "negate": false,
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}