CVE-2020-2732

EUVD-2020-22525
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.8 MEDIUM
ADJACENT_NETWORK
HIGH
LOW
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
oracleCNA
5.8 MEDIUM
ADJACENT_NETWORK
HIGH
LOW
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 62%
Affected Products (NVD)
VendorProductVersion
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.226-1
fixed
sid
6.11.6-1
fixed
trixie
6.11.5-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
bionic
Fixed 4.15.0-91.92
released
eoan
Fixed 5.3.0-42.34
released
focal
not-affected
trusty
ignored
xenial
Fixed 4.4.0-176.206
released
linux-aws
bionic
Fixed 4.15.0-1063.67
released
eoan
Fixed 5.3.0-1013.14
released
focal
not-affected
trusty
Fixed 4.4.0-1064.68
released
xenial
Fixed 4.4.0-1104.115
released
linux-aws-5.0
bionic
Fixed 5.0.0-1027.30
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-aws-hwe
bionic
dne
eoan
dne
focal
dne
trusty
dne
xenial
Fixed 4.15.0-1063.67~16.04.1
released
linux-azure
bionic
Fixed 5.0.0-1035.37
released
eoan
Fixed 5.3.0-1016.17
released
focal
not-affected
trusty
Fixed 4.15.0-1074.79~14.04.1
released
xenial
Fixed 4.15.0-1075.80
released
linux-azure-5.3
bionic
Fixed 5.3.0-1016.17~18.04.1
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-azure-edge
bionic
ignored
eoan
dne
focal
dne
trusty
dne
xenial
ignored
linux-gcp
bionic
Fixed 5.0.0-1033.34
released
eoan
Fixed 5.3.0-1014.15
released
focal
not-affected
trusty
dne
xenial
Fixed 4.15.0-1058.62
released
linux-gcp-5.3
bionic
Fixed 5.3.0-1014.15~18.04.1
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-gcp-edge
bionic
ignored
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-gke-4.15
bionic
Fixed 4.15.0-1055.58
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-gke-5.0
bionic
Fixed 5.0.0-1032.33
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-gke-5.3
bionic
Fixed 5.3.0-1014.15~18.04.1
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-hwe
bionic
Fixed 5.3.0-42.34~18.04.1
released
eoan
dne
focal
dne
trusty
dne
xenial
Fixed 4.15.0-91.92~16.04.1
released
linux-hwe-edge
bionic
ignored
eoan
dne
focal
dne
trusty
dne
xenial
ignored
linux-kvm
bionic
Fixed 4.15.0-1056.57
released
eoan
Fixed 5.3.0-1012.13
released
focal
not-affected
trusty
dne
xenial
Fixed 4.4.0-1068.75
released
linux-lts-trusty
bionic
dne
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-lts-xenial
bionic
dne
eoan
dne
focal
dne
trusty
Fixed 4.4.0-176.206~14.04.1
released
xenial
dne
linux-oem
bionic
Fixed 4.15.0-1076.86
released
eoan
Fixed 4.15.0-1076.86
released
focal
dne
trusty
dne
xenial
ignored
linux-oem-5.6
bionic
dne
eoan
dne
focal
not-affected
trusty
dne
xenial
dne
linux-oem-osp1
bionic
Fixed 5.0.0-1043.48
released
eoan
Fixed 5.0.0-1043.48
released
focal
dne
trusty
dne
xenial
dne
linux-oracle
bionic
Fixed 4.15.0-1035.39
released
eoan
Fixed 5.3.0-1011.12
released
focal
not-affected
trusty
dne
xenial
Fixed 4.15.0-1035.38~16.04.1
released
linux-oracle-5.0
bionic
Fixed 5.0.0-1013.18
released
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-oracle-5.3
bionic
not-affected
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-raspi2
bionic
not-affected
eoan
not-affected
focal
ignored
trusty
dne
xenial
not-affected
linux-raspi2-5.3
bionic
not-affected
eoan
dne
focal
dne
trusty
dne
xenial
dne
linux-snapdragon
bionic
not-affected
eoan
dne
focal
dne
trusty
dne
xenial
not-affected
Common Weakness Enumeration
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
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