Fedora sours on CC 'No Rights Reserved' license
Fedora, the popular Linux distribution, will no longer incorporate software licensed under CC0, the Creative Commons "No Rights Reserved" license.
In order to support the wide re-use of copyrighted content in new works, CC0 provides authors "a way to waive all their copyright and related rights in their works to the fullest extent allowed by law." The license arose in response to the 1998 Sonny Bono Copyright Term Extension Act (CTEA), which extended the duration of copyright by 20 years at the expense of the public domain.
But CC0 explicitly says the licensor does not waive patent rights, which for free and open source software (FOSS) is a potential problem. That means, for instance as described here, if you use CC0-licensed code in your project, and the author of that code later claims your project is infringing a patent they own regarding that code, your defense will be limited.
Avoiding the use of CC0-licensed code is one way to steer clear of these so-called submarine patents that could years later torpedo you.