CVE-2018-7995

low-risk

Published 2018-03-09

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

Do I need to act?

0.06% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.7/10 Medium

LOCAL / HIGH complexity

Affected Products (4)

Linux Kernel

Ubuntu Linux

Debian Linux

Affected Vendors

Debian Linux Canonical

References (20)

Third Party Advisory http://www.securityfocus.com/bid/103356

Issue Tracking https://bugzilla.suse.com/show_bug.cgi?id=1084755

Patch https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b3b7c4795...

Third Party Advisory https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html

Patch https://lkml.org/lkml/2018/3/2/970

Third Party Advisory https://usn.ubuntu.com/3654-1/

Third Party Advisory https://usn.ubuntu.com/3654-2/

Third Party Advisory https://usn.ubuntu.com/3656-1/

Third Party Advisory https://www.debian.org/security/2018/dsa-4187

Third Party Advisory https://www.debian.org/security/2018/dsa-4188