There is a new pull request by toluschr against master on the void-packages repository

https://github.com/toluschr/void-packages virtualbox-linux5.6
https://github.com/void-linux/void-packages/pull/20581

[NOMERGE] virtualbox-ose-dkms: linux5.6 patch
PR with the patches mentioned in #20576

https://www.virtualbox.org/changeset/83471/vbox
https://www.virtualbox.org/changeset/83473/vbox
https://www.virtualbox.org/changeset/83484/vbox

A patch file from https://github.com/void-linux/void-packages/pull/20581.patch is attached