CVE-2020-2732

MEDIUM

Red Hat Enterprise Linux - Exposure of Sensitive Information via KVM Nested Virtualization

Title source: llm

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 (14)

Core 14

Core References

Mailing List, Third Party Advisory x_refsource_misc

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

Patch, Third Party Advisory x_refsource_misc

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

Patch, Third Party Advisory x_refsource_misc

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

Patch, Third Party Advisory x_refsource_misc

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

Patch, Third Party Advisory x_refsource_misc

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

Issue Tracking, Third Party Advisory x_refsource_misc

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

Third Party Advisory x_refsource_misc

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

Third Party Advisory x_refsource_misc

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

Third Party Advisory x_refsource_misc

https://linux.oracle.com/errata/ELSA-2020-5543.html

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2020/dsa-4667

Mailing List mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html

Mailing List mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html

Mailing List mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2020/dsa-4698

Scores

CVSS v3 5.8

EPSS 0.0044

EPSS Percentile 63.2%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-200

Status published

Products (2)

redhat/enterprise_linux 7.0

redhat/enterprise_linux 8.0

Published Apr 08, 2020

Tracked Since Feb 18, 2026