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CVE-2019-7222

Published: 21 March 2019

The KVM implementation in the Linux kernel through 4.20.5 has an Information Leak.

From the Ubuntu security team

Felix Wilhelm discovered that an information leak vulnerability existed in the KVM subsystem of the Linux kernel, when nested virtualization is used. A local attacker could use this to expose sensitive information (host system memory to a guest VM).

Notes

AuthorNote
tyhicks
Ubuntu kernels do not enable nested KVM virtualization by default and
are unaffected by this flaw in the default configuration. However, installing
QEMU results in nested KVM support to be enabled via the
/etc/modprobe.d/qemu-system-x86.conf file. To ensure that nested
virtualization is not enabled, verify that the
/sys/module/kvm_intel/parameters/nested file contains "N".
Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-47.50)
cosmic
Released (4.18.0-17.18)
disco Not vulnerable
(5.0.0-7.8)
precise Ignored
(was needed ESM criteria)
trusty
Released (3.13.0-168.218)
upstream
Released (5.0~rc6)
xenial
Released (4.4.0-145.171)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 353c0956a618a07ba4bbe7ad00ff29fe70e8412a
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1035.37)
cosmic
Released (4.18.0-1012.14)
disco Not vulnerable
(5.0.0-1001.1)
precise Does not exist

trusty
Released (4.4.0-1040.43)
upstream
Released (5.0~rc6)
xenial
Released (4.4.0-1079.89)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.15.0-1035.37~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1014.14~18.04.1)
cosmic
Released (4.18.0-1014.14)
disco Not vulnerable
(5.0.0-1001.1)
precise Does not exist

trusty
Released (4.15.0-1041.45~14.04.1)
upstream
Released (5.0~rc6)
xenial
Released (4.15.0-1041.45)
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1014.14~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.15.0-1041.45)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial Ignored
(was needed ESM criteria)
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (5.0~rc6)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1029.31)
cosmic
Released (4.18.0-1008.9)
disco Not vulnerable
(5.0.0-1001.1)
precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.15.0-1029.31~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1008.9~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial Does not exist

linux-gke
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial Ignored
(end-of-life)
linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (5.0~rc6)
xenial Ignored
(end-of-life)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (5.0~rc6)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-17.18~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.15.0-47.50~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-15.16~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.15.0-47.50~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1031.31)
cosmic
Released (4.18.0-1009.9)
disco Not vulnerable
(5.0.0-1001.1)
precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.4.0-1043.49)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise
Released (3.13.0-168.218~precise1)
trusty Does not exist

upstream
Released (5.0~rc6)
xenial Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [end-of-life])
upstream
Released (5.0~rc6)
xenial Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [end-of-life])
upstream
Released (5.0~rc6)
xenial Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [end-of-life])
upstream
Released (5.0~rc6)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty
Released (4.4.0-144.170~14.04.1)
upstream
Released (5.0~rc6)
xenial Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (5.0~rc6)
xenial Does not exist

linux-mako
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (5.0~rc6)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (5.0~rc6)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1035.40)
cosmic
Released (4.15.0-1035.40)
disco Not vulnerable
(4.15.0-1035.40)
precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial Ignored
(was needs-triage now end-of-life)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1010.12)
cosmic
Released (4.15.0-1010.12)
disco Not vulnerable
(4.15.0-1010.12)
precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.15.0-1010.12~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1033.35)
cosmic
Released (4.18.0-1011.13)
disco Not vulnerable
(5.0.0-1004.4)
precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.4.0-1106.114)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1053.57)
cosmic Does not exist

disco Not vulnerable
(5.0.0-1010.10)
precise Does not exist

trusty Does not exist

upstream
Released (5.0~rc6)
xenial
Released (4.4.0-1110.115)