https://www.bleepingcomputer.com/news/technology/cisa-gps-software-bug-may-cause-unexpected-behavior-this-sunday/ > The Cybersecurity and Infrastructure Security Agency (CISA) warned that GPS deices might experience issues over the weekend because of a timing bug impacting Network Time Protocol  (NTP) servers running the GPS Daemon (GPSD) software. > "The Network Time Protocol (NTP) has been critical in ensuring time is accurately kept for various systems businesses and organizations rely on. Authentication mechanisms such as Time-based One-Time Password (TOTP) and Kerberos also rely heavily on time. As such, should there be a severe mismatch in time, users would not be able to authenticate and gain access to systems." - SANS ISC