It seems that the Linux Foundation has decided that both “systemd” and “segmentation fault” (lol?) are trademarked by them.
Doing a search on the USPTO shows no mark for that combination of words. Did the poster share the design? Because either there’s more to the story on their side or there’s more to the Linux Foundation side. For example, an overworked paralegal with no concept of what terms to include. Alternatively, someone being an asshole with a SLAPP suit. We need more information.