– Windows Hyper-V DoS (denial-of-service) vulnerability. Guests could crash the host via crafted network packets. Build 14393.970 fixed the VMSwitch driver.
Beyond CVEs, Microsoft included:
By 2021, Windows Server 2016 was five years into its 10-year LTSC lifecycle (mainstream support ended January 2022). Build 14393.3970 had long been replaced by dozens of later builds (e.g., 14393.4283, 14393.4585). However, the build number resurfaced in . Organizations migrating to Windows Server 2019 or 2022 would often test against a known stable build—like .3970—to ensure backward compatibility. Additionally, some industries (e.g., healthcare, manufacturing) with change control boards would freeze on a specific build like 14393.3970 for months, only moving to newer builds after extensive validation. windows server 2016 build 14393970 enus april 2017 2021