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CVE-2018-10901

Published: 26 July 2018

A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.

Priority

High

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (2.6.36~rc1)
bionic Does not exist

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

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (2.6.36~rc1)
xenial Does not exist

linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1001.1)
trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
linux-azure
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1002.2)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.11.0-1009.9)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.4.0-9019.20)
linux-kvm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1002.2)
xenial Not vulnerable
(4.4.0-1004.9)
trusty Does not exist

upstream
Released (2.6.36~rc1)
linux-oem
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1002.3)
trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.13.0-1008.9)
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-16.19)
trusty Not vulnerable
(3.11.0-12.19)
upstream Not vulnerable
(debian: Fixed before src:linux-2.6 -> src:linux rename)
xenial Not vulnerable
(4.2.0-16.19)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 3444d7da1839b851eefedd372978d8a982316c36
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Pending
(4.18.0-1003.3~18.04.1)
trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.15.0-1002.2)
linux-gcp
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1001.1)
trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.10.0-1004.4)
linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Ignored
(end of standard support)
linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (2.6.36~rc1)
xenial Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (2.6.36~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Not vulnerable

trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-8.9~18.04.1)
trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Does not exist

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

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (2.6.36~rc1)
xenial Does not exist

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

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (2.6.36~rc1)
xenial Does not exist

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

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (2.6.36~rc1)
xenial Does not exist

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

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (2.6.36~rc1)
xenial Does not exist

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

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (2.6.36~rc1)
xenial Does not exist

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

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (2.6.36~rc1)
xenial Ignored
(abandoned)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-1005.5)
trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.2.0-1013.19)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable

trusty Does not exist

upstream
Released (2.6.36~rc1)
xenial Not vulnerable
(4.4.0-1012.12)

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