CVE-2020-2732

Description

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1805135

https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec

https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c

https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d

https://linux.oracle.com/errata/ELSA-2020-5540.html

https://linux.oracle.com/errata/ELSA-2020-5542.html

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

https://www.openwall.com/lists/oss-security/2020/02/25/3

https://www.spinics.net/lists/kvm/msg208259.html

Details

Risk Information

CVSS v2

CVSS v3