There is an updated pull request by ndowens against master on the void-packages repository

https://github.com/ndowens/void-packages fastd
https://github.com/void-linux/void-packages/pull/26309

fastd: update to 21
@Gottox this fixes https://nvd.nist.gov/vuln/detail/CVE-2020-27638 Seems service does run as checked ps -aux | grep fastd

A patch file from https://github.com/void-linux/void-packages/pull/26309.patch is attached