linux kernel freezes system when starting vm in virtualbox

After kernel upgrade, linux kernel freezes system when starting vm in virtualbox. After freeze can't do anything. Only option to hard reboot system. Have seen similar issue with other systems after specter bug fixed.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.13.0-36-generic 4.13.0-36.40~16.04.1
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Mar 13 21:05:25 2018
InstallationDate: Installed on 2018-02-26 (15 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)