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CVE-2018-14678

Published: 28 July 2018

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

From the Ubuntu security team

M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service (guest VM crash).

Priority

Medium

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-47.50)
cosmic Not vulnerable
(4.17.0-9.10)
disco Not vulnerable
(4.18.0-10.11)
precise Not vulnerable
(3.0.0-12.20)
trusty Not vulnerable
(3.11.0-12.19)
upstream
Released (4.18~rc8)
xenial Not vulnerable
(4.2.0-16.19)
Patches:
Introduced by

3ac6d8c787b835b997eb23e43e09aa0895ef7d58

Fixed by b3681dd548d06deb2e1573890829dff4b15abf46
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1035.37)
cosmic Not vulnerable
(4.18.0-1002.3)
disco Not vulnerable
(4.18.0-1002.3)
precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (4.18~rc8)
xenial Not vulnerable
(4.4.0-1001.10)
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 (4.18~rc8)
xenial
Released (4.15.0-1035.37~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1011.11~18.04.1)
cosmic Not vulnerable
(4.18.0-1003.3)
disco Not vulnerable
(4.18.0-1003.3)
precise Does not exist

trusty
Released (4.15.0-1041.45~14.04.1)
upstream
Released (4.18~rc8)
xenial
Released (4.15.0-1041.45)
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.18.0-1011.11~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.18~rc8)
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 (4.18~rc8)
xenial Not vulnerable
(4.4.0-9019.20)
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 (4.18~rc8)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1029.31)
cosmic Not vulnerable
(4.18.0-1002.3)
disco Not vulnerable
(4.18.0-1002.3)
precise Does not exist

trusty Does not exist

upstream
Released (4.18~rc8)
xenial
Released (4.15.0-1029.31~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-1004.5~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-13.14~18.04.1)
cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.18~rc8)
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 (4.18~rc8)
xenial
Released (4.15.0-47.50~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1031.31)
cosmic Not vulnerable
(4.18.0-1002.2)
disco Not vulnerable
(4.18.0-1003.3)
precise Does not exist

trusty Does not exist

upstream
Released (4.18~rc8)
xenial Not vulnerable
(4.4.0-1004.9)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Not vulnerable
(3.13.0-24.46~precise1)
trusty Does not exist

upstream
Released (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
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 Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
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 (4.18~rc8)
xenial Not vulnerable

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 (4.18~rc8)
xenial
Released (4.15.0-1010.12~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1033.35)
cosmic Not vulnerable
(4.18.0-1004.6)
disco Not vulnerable
(4.18.0-1005.7)
precise Does not exist

trusty Does not exist

upstream
Released (4.18~rc8)
xenial Not vulnerable
(4.2.0-1013.19)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.4.0-1077.82)
cosmic Does not exist

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

trusty Does not exist

upstream
Released (4.18~rc8)
xenial Not vulnerable
(4.4.0-1012.12)