There is a new pull request by mobinmob against master on the void-packages repository

https://github.com/mobinmob/void-packages mbedtls
https://github.com/void-linux/void-packages/pull/20695

mbedtls: revert to 2.16.x LTS release, update to 2.16.5
https://tls.mbed.org/tech-updates/blog/announcing-lts-branch-mbedtls-2.16

A patch file from https://github.com/void-linux/void-packages/pull/20695.patch is attached