https://wccftech.com/first-windows-11-cumulative-update-drops-kb5006674-build-22000-258/

Windows 11 Update KB5006674 is now available for devices running the latest operating system from Microsoft. Today's Windows 11 cumulative update brings the build number up to 22000.258.

The October 2021 mandatory security update focuses on quality improvements and some security updates. The company said that it also "addresses known compatibility issues between some Intel 'Killer' and “SmartByte” networking software and Windows 11 (original release)."