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CVE-2018-7995

Published: 09 March 2018

** DISPUTED ** Race condition in the store_int_with_restart() function in arch/x86/kernel/cpu/mcheck/mce.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (panic) by leveraging root access to write to the check_interval file in a /sys/devices/system/machinecheck/machinecheck<cpu number> directory. NOTE: a third party has indicated that this report is not security relevant.

From the Ubuntu security team

It was discovered that a race condition existed in the x86 machine check handler in the Linux kernel. A local privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Negligible

CVSS 3 base score: 4.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-13.14)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by b3b7c4795ccab5be71f080774c45bbbcc75c2aaf
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1003.3)
linux-aws-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1003.3)
linux-azure-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1003.3)
linux-euclid
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1003.3)
linux-gcp-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.18.0-1004.5~18.04.1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.18.0-13.14~18.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-14.15~18.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1003.3)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1002.3)
linux-oracle
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1007.9)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(4.15.0-1006.7)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1053.57)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.16~rc5)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist