Apple today released iOS 11.2.1 which fixes bugs including an issue that could disable remote access to shared users of the Home app.
Apple today also released tvOS 11.2.1 which is likely also related to the above issue.
For information on the security content of Apple software updates, please visit this website: https://support.apple.com/kb/HT201222
MacDailyNews Take: Happy updating!
Zero-day iOS HomeKit flaw allowed remote access to IoT devices including door locks, garage door openers; fix rolling out – December 8, 2017