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CVE-2020-36311

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Date: April 6, 2021

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.

Language: C

Severity Score

Related Resources (9)

https://www.debian.org/security/2021/dsa-4941
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9
https://access.redhat.com/security/cve/CVE-2020-36311
https://security-tracker.debian.org/tracker/CVE-2020-36311
https://nvd.nist.gov/vuln/detail/CVE-2020-36311
https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-36311
https://www.mend.io/vulnerability-database/CVE-2020-36311

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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