CVE-2020-2732
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled.
Does this matter?
Lower severity and a low EPSS score (0.93%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- EPSS
- 0.93% probability · 60th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- redhat/enterprise linux
- Source
- secalert_us@oracle.com
EPSS 0.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.