I think the GPL license kind of implies that you do have a license to use it.

toast0 · on June 18, 2023

How does a copyright license imply a license of a third party's patent?

Open source mpeg codecs don't come with a patent license from mpeg and friends. Neither does a open source file system driver come with a patent license from microsoft and friends.

jeroenhd · on June 18, 2023

That's GPLv3, GPLv2 (which the exFAT code was licensed under) doesn't include patent rights.