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Vulnerability · Published Apr 6, 2021 · Assigned by mitre

CVE-2020-36311

Medium 5.5

In plain English

A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 73.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.9.1-1DEBIAN-CVE-2020-36311
Debian:13linux5.9.1-1DEBIAN-CVE-2020-36311
Debian:14linux5.9.1-1DEBIAN-CVE-2020-36311
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-36311
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-36311
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-36311

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References