Can a project built with STM32Cube IDE be Open Source?

[Soniccd123]

Hi, i've built a project with the STM32Cube IDE, using standard HAL drivers and the USB middleware. Would like to open source it and share to others to use it, learn from it and modify it as like. Is this possible or ST licensing forbids this? I've read that I can not license it to a open source license like GNU, but at least the source code can be shared in a site like GitHub?