Improper Access Control Affecting torvalds/linux package, versions [,4.13.4)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.02% (3rd percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006418
  • published26 Jan 2022
  • disclosed26 Sept 2017
  • creditUnknown

Introduced: 26 Sep 2017

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

How to fix?

Upgrade torvalds/linux to version 4.13.4 or higher.

Overview

Affected versions of this package are vulnerable to Improper Access Control. 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.

References

CVSS Base Scores

version 3.1