CVE-2018-7995
Published: 9 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.
Notes
| Author | Note |
|---|---|
| sbeattie | requires root privileges to write to the machinecheck sysfs files |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux-flo Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Does not exist
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Not vulnerable
(4.15.0-1003.3)
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.15.0-1007.7)
|
|
| disco |
Not vulnerable
(4.18.0-1002.3)
|
|
| trusty |
Released
(4.4.0-1022.22)
|
|
| xenial |
Released
(4.4.0-1060.69)
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Not vulnerable
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Not vulnerable
(4.15.0-1003.3)
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.15.0-1009.9)
|
|
| disco |
Not vulnerable
(4.18.0-1003.3)
|
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| xenial |
Released
(4.15.0-1013.13~16.04.2)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Not vulnerable
(4.15.0-1003.3)
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.15.0-1006.6)
|
|
| disco |
Not vulnerable
(4.18.0-1002.3)
|
|
| trusty |
Does not exist
|
|
| xenial |
Released
(4.15.0-1014.14~16.04.1)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Does not exist
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(was needs-triage ESM criteria)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Not vulnerable
(4.15.0-1003.3)
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Released
(4.15.0-1013.13~16.04.2)
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Not vulnerable
(4.18.0-1004.5~18.04.1)
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
upstream |
Released
(4.16~rc5)
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
|
linux Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
| bionic |
Not vulnerable
(4.15.0-13.14)
|
|
| cosmic |
Not vulnerable
(4.15.0-20.21)
|
|
| disco |
Not vulnerable
(4.18.0-10.11)
|
|
| trusty |
Ignored
(was needed ESM criteria)
|
|
| upstream |
Released
(4.16~rc5)
|
|
| xenial |
Released
(4.4.0-127.153)
|
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
|
linux-armadaxp 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
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
(4.16~rc5)
|
|
| xenial |
Ignored
(end of life, was needed)
|
|
|
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
(4.16~rc5)
|
|
| 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
(4.16~rc5)
|
|
| xenial |
Released
(4.15.0-24.26~16.04.1)
|
|
|
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
(4.16~rc5)
|
|
| xenial |
Released
(4.15.0-24.26~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1003.3)
|
|
| cosmic |
Not vulnerable
(4.15.0-1008.8)
|
|
| disco |
Not vulnerable
(4.18.0-1003.3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.16~rc5)
|
|
| xenial |
Released
(4.4.0-1026.31)
|
|
|
linux-linaro-omap 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-linaro-shared 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-linaro-vexpress 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-quantal 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-raring 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-saucy 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
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
(4.16~rc5)
|
|
| 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
(4.16~rc5)
|
|
| 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 needs-triage)
|
|
| upstream |
Released
(4.16~rc5)
|
|
| 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
(4.16~rc5)
|
|
| 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
(4.4.0-127.153~14.04.1)
|
|
| upstream |
Released
(4.16~rc5)
|
|
| 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
(4.16~rc5)
|
|
| 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
(4.16~rc5)
|
|
| 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1002.3)
|
|
| cosmic |
Not vulnerable
(4.15.0-1004.5)
|
|
| disco |
Not vulnerable
(4.15.0-1021.24)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.16~rc5)
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
| cosmic |
Not vulnerable
(4.15.0-1007.9)
|
|
| disco |
Not vulnerable
(4.15.0-1007.9)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.16~rc5)
|
|
| xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
|
linux-qcm-msm 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
| bionic |
Not vulnerable
(4.15.0-1006.7)
|
|
| cosmic |
Not vulnerable
(4.15.0-1010.11)
|
|
| disco |
Not vulnerable
(4.18.0-1005.7)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.16~rc5)
|
|
| xenial |
Released
(4.4.0-1090.98)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1093.98)
|
| 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
(4.16~rc5)
|
|
| xenial |
Released
(4.4.0-1093.98)
|
|
|
linux-ti-omap4 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
(4.16~rc5)
|
|
| xenial |
Does not exist
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.7 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7995
- https://lkml.org/lkml/2018/3/2/970
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b3b7c4795ccab5be71f080774c45bbbcc75c2aaf
- https://ubuntu.com/security/notices/USN-3654-1
- https://ubuntu.com/security/notices/USN-3654-2
- https://ubuntu.com/security/notices/USN-3656-1
- NVD
- Launchpad
- Debian