VirtualBox 4.3.12 Released with Various Fixes, [How to Upgrade]

May 18, 2014 — Leave a comment

virtualbox repository

The latest Virtualbox 4.3.12 has been released just days ago on May 16, 2014. The new release brings various fixes on NAT, GUI, VMM, and hosts.

Virtualbox 4.3.12 is a maintenance release. The following items were fixed and/or added:

  • VMM: fixed an occasional Guru Meditation (Mac OS X hosts only)
  • VMM: fixed a rare condition that would fail to invalidate guest TLB entries or would invalidate them when not required (Windows hosts only)
  • VMM: fixed a VERR_NOT_SUPPORTED Guru Meditation seen with certain guests, e.g. OpenServer 5.0.7
  • VMM: more fixes for MSR emulation on certain hardware
  • GUI: fixed mouse positioning with mouse integration disabled and multiple guest screens (Windows hosts only)
  • GUI: fixed crash in VM manager
  • GUI: fixed crash under rare conditions on entering/exiting fullscreen/seamless mode
  • Shared Clipboard: don’t stop working after taking a snapshot
  • AHCI: fixed a crash under rare circumstances
  • API: fixed a hang during VM shutdown under rare conditions
  • NAT: fixed generation of malformed ICMP error datagrams (4.3.10 regression)
  • NAT: fixed potential crash in DNS proxy
  • NAT Network: don’t drop port forwarding rules after some time
  • NAT: fixed ARP cache corruption and network loss in Windows guest caused by iSCSI service activity
  • USB: improved check if a storage device is currently mounted to the host when the device is about to be attached to the VM (Mac OS X hosts only)
  • 3D support: several fixes, including better support for Ubuntu 14.04
  • VRDP: fixed a potential crash on client disconnect
  • VBoxSVC: fixed a race when a new client is started a few seconds after the last client terminated (Windows hosts only)
  • VBoxSVC: fixed VirtualBox.xml registry corruption after VM renaming
  • VBoxSVC: fixed a potential crash caused by incorrect USB device filter (Mac OS X hosts only)
  • Windows hosts: partly support 32-bit COM on 64-bit systems
  • Windows host installer: implemented merge module (msm) support
  • Linux hosts: fixed dependency of boot script on older Debian systems
  • Linux guests: fix symbolic link to shared folder helper
  • Linux Additions: don’t crash VBoxService during guest execute for users without a password
  • Linux Additions: fixed a bug in guest execution where the guest process terminated with VERR_INTERRUPTED to the host

How to install or upgrade:

You can either get the .deb installer from the link below:

Download Virtualbox for Linux

Or get it from the official Linux repository by running the commands below one by one in a terminal (Ctrl+Alt+T):

sudo sh -c 'echo "deb $(lsb_release -sc) contrib" >> /etc/apt/sources.list.d/virtualbox.list'

wget -q -O- | sudo apt-key add -

sudo apt-get update

sudo apt-get install virtualbox-4.3

If you already have Virtualbox repository added in your system, just run the last two commands will do the job. That’s it enjoy!

I'm a freelance blogger who started using Ubuntu 5+ years ago and wishes to share my experiences and some useful tips with Ubuntu beginners and lovers. Please notify me if you find any typo/grammar/language mistakes. English is not my native language. Contact me on Google Plus or email to

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