Race Condition Affecting kernel package, versions <0:4.14.33-59.34.amzn2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2-KERNEL-1661909
- published27 Sept 2021
- disclosed9 Mar 2018
Introduced: 9 Mar 2018
CVE-2018-7995 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.33-59.34.amzn2 or higher.
This issue was patched in ALAS2-2018-994.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
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
References
- http://www.securityfocus.com/bid/103356
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7995
- https://www.debian.org/security/2018/dsa-4187
- https://www.debian.org/security/2018/dsa-4188
- 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://lkml.org/lkml/2018/3/2/970
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
- https://usn.ubuntu.com/3654-1/
- https://usn.ubuntu.com/3654-2/
- https://usn.ubuntu.com/3656-1/