Users on the Windows 10 preview build 9879 are starting to see a patch being sent out via Windows Update



From Windows Central:

According to Microsoft's Gabriel Aul on Twitter:

"Calling all #WindowsInsiders! Just posted hotfix for the 0xAB bluescreen that some in Fast ring were hitting. Please go to WU to download!"

It looks like Microsoft wants to see how the update performs before pushing out build 9879 to Slow ring users

  Microsoft pushes update patch for Windows 10 build 9879