CVE-2020-2732

low-risk
Published 2020-04-08

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.

Do I need to act?

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0.44% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.8/10 Medium
ADJACENT_NETWORK / HIGH complexity

Affected Products (2)

Affected Vendors

Redhat

References (28)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1805135
Patch https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec
Patch https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c
Patch https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d
Third Party Advisory https://linux.oracle.com/errata/ELSA-2020-5540.html
Third Party Advisory https://linux.oracle.com/errata/ELSA-2020-5542.html
Third Party Advisory https://linux.oracle.com/errata/ELSA-2020-5543.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
https://www.debian.org/security/2020/dsa-4667
https://www.debian.org/security/2020/dsa-4698
Mailing List https://www.openwall.com/lists/oss-security/2020/02/25/3
Patch https://www.spinics.net/lists/kvm/msg208259.html
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1805135
Patch https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec
Patch https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c
Patch https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d
Third Party Advisory https://linux.oracle.com/errata/ELSA-2020-5540.html
Third Party Advisory https://linux.oracle.com/errata/ELSA-2020-5542.html
and 8 more references
24
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 2/34 · Minimal
Exposure 7/34 · Low