CVE-2020-36311

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Summary

CVECVE-2020-36311
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-07 00:15:13 UTC
Updated2026-10-08 21:17:29 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.003350000 probability, percentile 0.249580000 (date 2026-10-10)

Problem Types: NVD-CWE-noinfo | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:L/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] [DLA 2714-1] linux-4.19 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-4941-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch, Vendor Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9 af854a3a-2127-422b-91ae-364da2661108 cdn.kernel.org Release Notes, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159393 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2021-9450)
  • 159394 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel-container (ELSA-2021-9451)
  • 174916 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1210-1)
  • 174917 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1211-1)
  • 174919 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1238-1)
  • 174925 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1248-1)
  • 174938 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1301-1)
  • 178710 Debian Security Update for linux (DSA 4941-1)
  • 178713 Debian Security Update for linux-4.19 (DLA 2714-1)
  • 198487 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5071-1)
  • 198502 Ubuntu Security Notification for Linux kernel (HWE) Vulnerabilities (USN-5071-2)
  • 198548 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-5120-1)
  • 353145 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-006
  • 670416 EulerOS Security Update for kernel (EulerOS-SA-2021-1983)
  • 670449 EulerOS Security Update for kernel (EulerOS-SA-2021-2051)
  • 670514 EulerOS Security Update for kernel (EulerOS-SA-2021-2272)
  • 750004 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1573-1)
  • 750006 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1596-1)
  • 750015 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1624-1)
  • 750199 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:0758-1)
  • 750261 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:0579-1)
  • 750650 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1975-1)
  • 750652 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:1977-1)
  • 750762 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1977-1)
  • 750766 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1975-1)

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