CVE-2018-10853
Published: 11 September 2018
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
From the Ubuntu Security Team
Andy Lutomirski and Mika Penttilä discovered that the KVM implementation in the Linux kernel did not properly check privilege levels when emulating some instructions. An unprivileged attacker in a guest VM could use this to escalate privileges within the guest.
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-36.39)
|
artful |
Ignored
(end of life)
|
|
cosmic |
Not vulnerable
(4.17.0-6.7)
|
|
disco |
Not vulnerable
(4.18.0-10.11)
|
|
trusty |
Ignored
(was needed ESM criteria)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.4.0-133.159)
|
|
Patches: Introduced by 129a72a0d3c8e139a04512325384fe5ac119e74d |
||
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.18~rc1)
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.18~rc1)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
(4.4.0-9019.20)
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1004.5~18.04.1)
|
upstream |
Released
(4.18~rc1)
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1021.24)
|
upstream |
Released
(4.18~rc1)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1021.24)
|
|
disco |
Not vulnerable
(4.15.0-1021.24)
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
upstream |
Released
(4.18~rc1)
|
|
cosmic |
Not vulnerable
(4.15.0-1007.9)
|
|
disco |
Not vulnerable
(4.15.0-1007.9)
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1023.23)
|
|
cosmic |
Not vulnerable
(4.18.0-1002.3)
|
|
disco |
Not vulnerable
(4.18.0-1002.3)
|
|
trusty |
Released
(4.4.0-1027.30)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.4.0-1065.75)
|
|
linux-azure Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1025.26)
|
|
cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
disco |
Not vulnerable
(4.18.0-1003.3)
|
|
trusty |
Released
(4.15.0-1030.31~14.04.1)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.15.0-1025.26~16.04.1)
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1025.26)
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.15.0-1025.26~16.04.1)
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1021.22)
|
|
cosmic |
Not vulnerable
(4.18.0-1002.3)
|
|
disco |
Not vulnerable
(4.18.0-1002.3)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.15.0-1021.22~16.04.1)
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Ignored
(end of life, was needs-triage)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-13.14~18.04.1)
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.15.0-36.39~16.04.1)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(5.0.0-14.15~18.04.1)
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.15.0-36.39~16.04.1)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1023.23)
|
|
cosmic |
Not vulnerable
(4.18.0-1002.2)
|
|
disco |
Not vulnerable
(4.18.0-1003.3)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.4.0-1031.37)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Ignored
(end of life, was ignored)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Ignored
(end of life, was ignored)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Ignored
(end of life, was ignored)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Released
(4.4.0-133.159~14.04.1)
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
bionic |
Released
(4.15.0-1024.26)
|
|
cosmic |
Not vulnerable
(4.18.0-1004.6)
|
|
disco |
Not vulnerable
(4.18.0-1005.7)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.4.0-1094.102)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
bionic |
Released
(4.15.0-1053.57)
|
|
cosmic |
Does not exist
|
|
disco |
Not vulnerable
(5.0.0-1010.10)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.18~rc1)
|
|
xenial |
Released
(4.4.0-1098.103)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.8 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |