I purposely named this question similar to Do I have to worry about copyright issues for code posted on Stack Overflow?. Since Fedora is banning CC-0 licensed source code citing issue of explicitly claiming patents not being touched by the license, I also found out that the current licenses for the post (including source code) is licensed as CC-BY 4.0, which also included a similar clause:
§2.b.2 Patent and trademark rights are not licensed under this Public License.
I believe that source code copied from Stack Exchange websites are also affected. Is my interpretation correct?