The Windows Server 2019 (LTSC) GKE node image doesn't receive updates after the December 2025 version.

The Windows Server 2019 (LTSC) GKE node image doesn't receive updates after the December 2025 version. Windows Server 2019 (LTSC) is in the Extended Support period of the Microsoft fixed lifecycle policy and receives only security updates. To prevent stability issues, the GKE node image for Windows Server 2019 (LTSC) is pinned to the December 2025 version. If you use this node image, switch to Windows Server 2022 (LTSC), which is in the Mainstream Support period and receives updates from Microsoft and GKE. For more information, see Creating a cluster using Windows Server node pools.