Incorrect Calculation of Buffer Size Affecting kernel-rt-kvm package, versions <0:4.18.0-348.12.2.rt7.143.el8_5


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELRTKVM-2332335
  • published10 Jan 2022
  • disclosed10 Jan 2022

Introduced: 10 Jan 2022

CVE-2021-4155  (opens in a new tab)
CWE-131  (opens in a new tab)

How to fix?

Upgrade Centos:8 kernel-rt-kvm to version 0:4.18.0-348.12.2.rt7.143.el8_5 or higher.

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 Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

CVSS Scores

version 3.1