Install Newer Versions of VirtualBox
The virtualization platform is an essential component of a secure Whonix ™ system. A vulnerable virtualizer may provide opportunities for attackers to perform a breakout from a virtual machine in order to undo the security by isolation features that Whonix ™ provides. The decision to install an alternative virtualizer should not be taken lightly.
The two methods described below to install VirtualBox are safer than downloading, verifying, and installing binaries manually.
Recommended VirtualBox Version
Moved to recommended VirtualBox version.
Newer VirtualBox Version
Install VirtualBox from Debian Unstable
Install from VirtualBox.org Repository
Note: after upgrading the VirtualBox host version, this can cause issues with the guest VMs such as broken VM size adjustment (full screen)  unless the VirtualBox guest additions are also upgraded inside your virtual machine (which is not covered in these instructions).
Dependencies such as for package
glibcare too new. This means a host of updated dependencies from Debian unstable are pulled and mixed with Debian stable, often leading to many issues including system instability.
- Problems after upgrading Whonix - cannot full size Whonix-Workstation screen [archive]
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