CVE-2020-36311

Aliases:UBUNTU-CVE-2020-36311DEBIAN-CVE-2020-36311
Advisory lineage Upstream: 0 Downstream: 23
Modified
Published: 06 Apr 2021, 23:28
Last modified:04 Aug 2024, 17:23

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.34% LOW
0% probability +0.23%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Apr 2021, 23:28
Published
Vulnerability first disclosed
04 Aug 2024, 17:23
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.34%• Percentile: 27%

Affected Systems

  • debian•linux

    < 5.9.1-1 | < 5.9.1-1 | < 5.9.1-1 | < 5.9.1-1

  • ubuntu•linux

    < 5.4.0-84.94

  • ubuntu•linux-aws

    < 5.4.0-1056.59

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1056.59~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 5.4.0-1069.73+fips2 | all

  • ubuntu•linux-azure

    all | < 5.4.0-1058.60

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1058.60~18.04.1

  • ubuntu•linux-azure-5.8

    < 5.8.0-1043.46~20.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 5.4.0-1073.76+fips1 | all

  • ubuntu•linux-bluefield

    all | < 5.4.0-1019.22

  • ubuntu•linux-fips

    < 5.4.0-1033.38 | all

  • ubuntu•linux-gcp

    all | < 5.4.0-1052.56

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1052.56~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    < 5.4.0-1067.71~20.04.1 | all

  • ubuntu•linux-gke

    < 5.4.0-1052.55

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1052.55~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1023.24

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1023.24~18.04.1

  • ubuntu•linux-hwe

    all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-84.94~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 5.4.0-1046.48

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 5.4.0-1054.58

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1054.58~18.04.1

  • ubuntu•linux-oracle-5.8

    all

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv-5.8

    all

  • debian•debian_linux

    9.0 | 10.0

  • linux•linux_kernel

    < 5.9.0

References (11)