virtualbox crashes randomly under vagrant

I am using vagrant, and virtualbox has crashed on me multiple times now whilst I was using the VM.

From dmesg:
VBoxHeadless[4020]: segfault at 44 ip 00007fe6de921bb0 sp 00007fe6dc4f8d00 error 4 in VBoxDD.so[7fe6de859000+142000]

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: virtualbox 4.1.12-dfsg-2ubuntu0.6
ProcVersionSignature: Ubuntu 3.5.0-51.77~precise1-generic 3.5.7.33
Uname: Linux 3.5.0-51-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Fri Jun 20 15:41:02 2014
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: virtualbox
UpgradeStatus: No upgrade log present (probably fresh install)