### [CVE-2014-3690](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3690)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20n%2Fa%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.

### POC

#### Reference
- http://www.openwall.com/lists/oss-security/2014/10/21/4
- http://www.openwall.com/lists/oss-security/2014/10/29/7

#### Github
No PoCs found on GitHub currently.