First off, wrongthink is not a thing, you're thinking of crimethink.
Second off, those are literally different things. Malinformation is defined in the article as information shared, out of context, with harmful intention. Crimethink is not about sharing or intentions, it's literally about having a thought that goes against The Party. No need to share.
If this is what flies, CNN are guilty of malinformation daily, through their use of editorialising, never mind more fringe stuff.