I agree with the spirit of your comment (CC makes sense for SVGs), but I also don't think it's quite as simple as content vs. code. there are many icon sets that are distributed as font binaries, for example, which are software; in which case the OFL (SIL open font license -- https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id...) might make more sense.
https://creativecommons.org/share-your-work/