PRIOn knowledge basePRION:CVE-2020-2732Design/Logic Flaw
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
bugzilla.redhat.com/show_bug.cgi?id=1805135
git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec
git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c
git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d
linux.oracle.com/errata/ELSA-2020-5540.html
linux.oracle.com/errata/ELSA-2020-5542.html
linux.oracle.com/errata/ELSA-2020-5543.html
lists.debian.org/debian-lts-announce/2020/06/msg00011.html
lists.debian.org/debian-lts-announce/2020/06/msg00012.html
lists.debian.org/debian-lts-announce/2020/06/msg00013.html
www.debian.org/security/2020/dsa-4667
www.debian.org/security/2020/dsa-4698
www.openwall.com/lists/oss-security/2020/02/25/3
www.spinics.net/lists/kvm/msg208259.html
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