Improper Initialization Affecting kernel-rt-debug package, versions <0:4.18.0-193.70.1.rt13.120.el8_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUG-3988108
  • published26 Sept 2021
  • disclosed23 Sept 2021

Introduced: 23 Sep 2021

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

How to fix?

Upgrade RHEL:8 kernel-rt-debug to version 0:4.18.0-193.70.1.rt13.120.el8_2 or higher.
This issue was patched in RHSA-2021:4875.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by RHEL. See How to fix? for RHEL:8 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