Out-of-bounds Write Affecting kernel-rt-core package, versions <0:4.18.0-477.10.1.rt7.274.el8_8


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.08% (35th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELRTCORE-2957736
  • published21 Jul 2022
  • disclosed5 Jan 2021

Introduced: 5 Jan 2021

CVE-2021-33656  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Centos:8 kernel-rt-core to version 0:4.18.0-477.10.1.rt7.274.el8_8 or higher.

NVD Description

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

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

CVSS Scores

version 3.1