CVE-2018-7995: Race Condition
First published: Fri Mar 09 2018(Updated: )
** 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.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.10-1 6.12.11-1 | |
| Linux Kernel | <=4.15.7 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Debian GNU/Linux | =7.0 |
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Reference Links
- 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
- https://launchpad.net/bugs/cve/CVE-2018-7995
- https://security-tracker.debian.org/tracker/CVE-2018-7995
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7995
- https://nvd.nist.gov/vuln/detail/CVE-2018-7995
- https://ubuntu.com/security/CVE-2018-7995
Frequently Asked Questions
What is the severity of CVE-2018-7995?
CVE-2018-7995 has been classified as a denial of service vulnerability due to a race condition in the Linux kernel.
How do I fix CVE-2018-7995?
To fix CVE-2018-7995, update your Linux kernel to a version later than 4.15.7, including patched versions such as 5.10.223-1 or 6.1.123-1.
Which versions of Linux are affected by CVE-2018-7995?
CVE-2018-7995 affects the Linux kernel up to version 4.15.7 and specific distributions including Ubuntu 14.04, Ubuntu 16.04, and Debian 7.0.
How can CVE-2018-7995 be exploited?
CVE-2018-7995 can be exploited by local users with root access who write to the check_interval file causing system panic.
Is there a known mitigation for CVE-2018-7995?
The primary mitigation for CVE-2018-7995 is to ensure that systems are updated with the latest kernel patches that address the race condition.
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