Skip to main content
Effective December 3 - NetApp adopts Microsoft’s Business-to-Customer (B2C) identity management to simplify and provide secure access to NetApp resources. For accounts that did not pre-register (prior to Dec 3) access to your NetApp data may take up to 1 hour as your legacy NSS ID is synchronized to the new B2C identity. To learn more, Read the FAQ and Watch the video.
NetApp Knowledge Base

GPS Daemon (GPSD) Rollover Bug

Last Updated:

Applies to

  • Stratum 1 primary Network Time Protocol (NTP) servers


Critical Infrastructure (CI) owners and operators, and other users who obtain Coordinated Universal Time (UTC) from Global Positioning System (GPS) devices, should be aware of a GPS Daemon (GPSD) bug in GPSD versions 3.20 (released December 31, 2019) through 3.22 (released January 8, 2021). 
On October 24, 2021, Network Time Protocol (NTP) servers using bugged GPSD versions 3.20-3.22 may rollback the date 1,024 weeks—to March 2002—which may cause systems and services to become unavailable or unresponsive.  
Cybersecurity and Infrastructure Security Agency (CISA) urges affected CI owners and operators to ensure systems—that use GPSD to obtain timing information from GPS devices—are using GPSD version 3.23 (released August 8, 2021) or newer.

NTP is based on a hierarchy of levels, where each level is assigned a number called the stratum. Stratum 1 (primary) servers at the lowest level are directly synchronized to national time services via satellite, radio, or modem. Stratum 2 (secondary) servers are synchronized to stratum 1 servers and so on. Usually, NTP clients and servers connect to Stratum 2 servers. 




Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support