Nope, they don't violate it: https://www.gnu.org/licenses/gpl-faq.html#ExportWarranties https://www.gnu.org/licenses/gpl-faq.html#ExportWarranties Besides, the

Nope, they don't violate it: https://www.gnu.org/licenses/gpl-faq.html#ExportWarranties https://www.gnu.org/licenses/gpl-faq.html#ExportWarranties Besides, they either own the code, licensed said code by a contributor or another software maker to Oracle on a perpetual, sublicensable terms or used Expat-licensed (MIT-licensed) code. All of these does not restrict Oracle from assigning any copyright conditions apart from the required attributions on Expat-licensed code. It could be closed-source and they will still be fine.