Improper Initialization Affecting kernel-tools package, versions <0:4.14.252-195.481.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-AMZN2-KERNELTOOLS-1911161
  • published5 Nov 2021
  • disclosed27 Sept 2021

Introduced: 27 Sep 2021

CVE-2021-20317  (opens in a new tab)
CWE-665  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel-tools to version 0:4.14.252-195.481.amzn2 or higher.
This issue was patched in ALAS2-2021-1719.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.

CVSS Scores

version 3.1