Race Condition Affecting kernel-modules-extra package, versions <0:4.18.0-348.el8


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.08% (37th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELMODULESEXTRA-2138709
  • published26 Jul 2021
  • disclosed3 Jun 2020

Introduced: 3 Jun 2020

CVE-2020-29368  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Centos:8 kernel-modules-extra to version 0:4.18.0-348.el8 or higher.

NVD Description

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

An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.

CVSS Scores

version 3.1