Oracle has released VirtualBox 5.1 Maintenance Release 22.
This release includes improvements and regression fixes for Oracle VM VirtualBox 5.1. Between them we can mention following regression for 5.1.20, now fixed:
- Linux Additions: fixed mount.vboxsf symlink problem (5.1.20 regression)
- Storage: fixed a potential hang under rare circumstances
- VMM: fixed software virtualization on Solaris hosts (5.1.20 regressionn)
See all the details here with a complete list of bug fixes; here you can find all the links to download the software.
The Oracle VirtualBox Team