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CVE-2020-36311

Status: ModifiedMedium (5.5)—

An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-36311",
  "cveTags": [],
  "metrics": {
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          "version": "2.0.3",
          "timestamp": "2026-10-08T21:00:35.710173Z"
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          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
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          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
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        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
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  "published": "2021-04-07T00:15:13.150",
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  "vulnStatus": "Modified",
  "weaknesses": [
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    {
      "lang": "en",
      "value": "An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en el kernel de Linux versiones anteriores a 5.9. El archivo arch/x86/kvm/svm/sev.c permite a atacantes causar una denegación de servicio (bloqueo suave) al desencadenar la destrucción de una SEV VM grande (que requiere anular el registro de muchas regiones cifradas), también se conoce como CID-7be74942f184"
    }
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  "lastModified": "2026-10-08T21:17:29.923",
  "configurations": [
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}