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

https://github.com/freshprince/void-packages cifs-util-caps
https://github.com/void-linux/void-packages/pull/27227

cifs-utils: fix mounting with new libcap-ng
This fixes the error "Unable to apply new capability set." when trying to mount cifs on an up-to-date system.

A patch file from https://github.com/void-linux/void-packages/pull/27227.patch is attached