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.
Metrics
CVSS 3.1 6.8/10
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Oracle Corporation | Oracle Linux | 7; 6 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1805135Issue Tracking, Third Party Advisory
- https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ecPatch, Third Party Advisory
- https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75cPatch, Third Party Advisory
- https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020dPatch, Third Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5540.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5542.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5543.htmlThird Party Advisory
- 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/2020/02/25/3Mailing List, Third Party Advisory
- https://www.spinics.net/lists/kvm/msg208259.htmlPatch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1805135Issue Tracking, Third Party Advisory
- https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ecPatch, Third Party Advisory
- https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75cPatch, Third Party Advisory
- https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020dPatch, Third Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5540.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5542.htmlThird Party Advisory
- https://linux.oracle.com/errata/ELSA-2020-5543.htmlThird Party Advisory
- 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/2020/02/25/3Mailing List, Third Party Advisory
- https://www.spinics.net/lists/kvm/msg208259.htmlPatch, Third Party Advisory
Timeline
- Published
- Apr 8, 2020
- Last modified
- Jun 17, 2026
- NVD status
- Modified