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CVE-2018-12896

Published: 2 July 2018

An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.

From the Ubuntu security team

It was discovered that an integer overrun vulnerability existed in the POSIX timers implementation in the Linux kernel. A local attacker could use this to cause a denial of service.

Priority

Low

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful Ignored
(reached end-of-life)
bionic
Released (4.15.0-43.46)
cosmic Not vulnerable
(4.18.0-9.10)
precise Ignored
(was needed ESM criteria)
trusty
Released (3.13.0-164.214)
upstream
Released (4.19~rc1)
xenial
Released (4.4.0-141.167)
linux-aws
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1031.33)
cosmic Not vulnerable
(4.18.0-1002.3)
precise Does not exist

trusty
Released (4.4.0-1037.40)
upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1074.84)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1031.33~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1036.38)
cosmic Not vulnerable
(4.18.0-1003.3)
precise Does not exist

trusty
Released (4.15.0-1036.38~14.04.2)
upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1036.38~16.04.1)
linux-azure-edge
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Not vulnerable
(4.18.0-1006.6~18.04.1)
cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.18.0-1006.6~16.04.2)
linux-euclid
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Ignored
(was needed ESM criteria)
linux-flo
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1026.27)
cosmic Not vulnerable
(4.18.0-1002.3)
precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1026.27~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-1004.5~18.04.1)
cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Does not exist

linux-gke
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Ignored
(end-of-life)
linux-goldfish
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Ignored
(end-of-life)
linux-grouper
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~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

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-43.46~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Not vulnerable
(4.18.0-13.14~18.04.1)
cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-43.46~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1028.28)
cosmic Not vulnerable
(4.18.0-1003.3)
precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1039.45)
linux-lts-trusty
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise
Released (3.13.0-164.214~precise1)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty
Released (4.4.0-141.167~14.04.1)
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1030.35)
cosmic
Released (4.15.0-1030.35)
precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Ignored
(was needed now end-of-life)
linux-oracle
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1007.9)
cosmic Not vulnerable

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
artful Ignored
(reached end-of-life)
bionic
Released (4.15.0-1030.32)
cosmic Not vulnerable
(4.18.0-1005.7)
precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1102.110)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful Ignored
(reached end-of-life)
bionic Not vulnerable

cosmic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1106.111)