Out-of-bounds Write Affecting kernel-rt-debug-kvm package, versions <0:5.14.0-284.11.1.rt14.296.el9_2


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-CENTOS9-KERNELRTDEBUGKVM-2953466
  • published20 Jul 2022
  • disclosed8 Jul 2022

Introduced: 8 Jul 2022

CVE-2021-33655  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Centos:9 kernel-rt-debug-kvm to version 0:5.14.0-284.11.1.rt14.296.el9_2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.

CVSS Scores

version 3.1