CVE-2020-36311

MEDIUM

Linux Kernel < 5.9 - Denial of Service via SEV VM Destruction

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4941

Scores

CVSS v3 5.5
EPSS 0.0034
EPSS Percentile 25.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (3)
debian/debian_linux 9.0
debian/debian_linux 10.0
linux/linux_kernel < 5.9.0
Published Apr 07, 2021
Tracked Since Feb 18, 2026