CVE-2018-7995

Severity: medium (CVSS 4.7 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-09 · updated 2026-06-17
Weakness: CWE-362

Description

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

Affected products

Canonical Ubuntu Linux: 14.04, 16.04
Debian Linux: 7.0
Linux kernel: through 4.15.7

References

http://www.securityfocus.com/bid/103356
https://bugzilla.suse.com/show_bug.cgi?id=1084755
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b3b7c4795ccab5be71f080774c45bbbcc75c2aaf
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
https://lkml.org/lkml/2018/3/2/970
https://usn.ubuntu.com/3654-1/
https://usn.ubuntu.com/3654-2/
https://usn.ubuntu.com/3656-1/
https://www.debian.org/security/2018/dsa-4187
https://www.debian.org/security/2018/dsa-4188
http://www.securityfocus.com/bid/103356
https://bugzilla.suse.com/show_bug.cgi?id=1084755

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