There still are a lot of lines in a lot of files that were written by Sun employees which are now owned by Oracle. So the same way a kernel developer has a pote

There still are a lot of lines in a lot of files that were written by Sun employees which are now owned by Oracle. So the same way a kernel developer has a potential standing to sue canonical over their potential GPL violation, Oracle has the same potential standing to sue canonical over their potential CDDL violation. It's just that oracle is ever so much more likely to sue and actually win (see: the google api's are copyrightable case)