Access Restriction Bypass Affecting torvalds/linux package, versions [,4.6.4)


Severity

Recommended
0.0
high
0
10

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

Threat Intelligence

EPSS
0.12% (34th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006361
  • published26 Jan 2022
  • disclosed27 Jun 2016
  • creditUnknown

Introduced: 27 Jun 2016

CVE-2016-4440  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.6.4 or higher.

Overview

Affected versions of this package are vulnerable to Access Restriction Bypass arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which allows guest OS users to obtain direct APIC MSR access on the host OS, and consequently cause a denial of service (host OS crash) or possibly execute arbitrary code on the host OS, via x2APIC mode.

CVSS Base Scores

version 3.1