Incomplete Cleanup Affecting kernel-rt-modules-extra package, versions <0:4.18.0-372.9.1.rt7.166.el8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTMODULESEXTRA-4244117
  • published27 Nov 2021
  • disclosed25 Nov 2021

Introduced: 25 Nov 2021

CVE-2021-4002  (opens in a new tab)
CWE-459  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-modules-extra to version 0:4.18.0-372.9.1.rt7.166.el8 or higher.
This issue was patched in RHSA-2022:1975.

NVD Description

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

A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.

CVSS Scores

version 3.1