Incorrect Authorization Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-193.64.1.rt13.115.el8_2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTDEBUGKVM-3957750
  • published26 Jul 2021
  • disclosed18 May 2021

Introduced: 18 May 2021

CVE-2021-22543  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-debug-kvm to version 0:4.18.0-193.64.1.rt13.115.el8_2 or higher.
This issue was patched in RHSA-2021:3375.

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

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

CVSS Scores

version 3.1