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Improper Access Control Affecting kernel-rt package, versions <0:3.10.0-862.rt56.804.el7

Severity

 Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.06% (28th percentile)

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  • Snyk IDSNYK-CENTOS7-KERNELRT-2099585
  • published26 Jul 2021
  • disclosed12 Sept 2017
Report a new vulnerability Found a mistake?

Introduced: 12 Sep 2017

CVE-2017-12154  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

Upgrade Centos:7 kernel-rt to version 0:3.10.0-862.rt56.804.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.