[tedd4u]

There are many documented, exploited-in-the-wild font-file attacks (one example in 1]). Apple is re-writing their font interpreter specifically to improve security. [2]

[1] https://www.bleepingcomputer.com/news/security/facebook-disc...

[2] https://blakecrosley.com/blog/truetype-hinting-swift-migrati...