This is not necessarily straightforward. Also, Oracle has form.
On the page cited there's no reference to licence/license. Fair enough - it's a release notes page. The only sub-page (using the menu on the left) that contains any reference to licence is the Contributors page, which isn't somewhere most users would head to.
The primary page - https://www.virtualbox.org/ - has one reference to Licence - and that's as part of the assurance that VirtualBox is "an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License".
And if you read that, assumed the best, and went on your way, you'd soon be in breach.
(Yes, you should probably visit https://www.virtualbox.org/wiki/Licensing_FAQ despite the above assurance on the front page -- at which point you'd learn about the Extension pack, the PUEL, and other usage constraints.)
On the page cited there's no reference to licence/license. Fair enough - it's a release notes page. The only sub-page (using the menu on the left) that contains any reference to licence is the Contributors page, which isn't somewhere most users would head to.
The primary page - https://www.virtualbox.org/ - has one reference to Licence - and that's as part of the assurance that VirtualBox is "an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License".
And if you read that, assumed the best, and went on your way, you'd soon be in breach.
(Yes, you should probably visit https://www.virtualbox.org/wiki/Licensing_FAQ despite the above assurance on the front page -- at which point you'd learn about the Extension pack, the PUEL, and other usage constraints.)