Race Condition Affecting kernel-rt-kvm package, versions <0:4.18.0-348.7.1.rt7.137.el8_5


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL8-KERNELRTKVM-4218066
  • published13 Oct 2021
  • disclosed11 Oct 2021

Introduced: 11 Oct 2021

CVE-2021-20321  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-kvm to version 0:4.18.0-348.7.1.rt7.137.el8_5 or higher.
This issue was patched in RHSA-2021:5241.

NVD Description

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

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

CVSS Scores

version 3.1