The latest monthly roll up update KB4041693 for Windows 8.1 has been released and the changelog is below
To access the update history of the monthly roll up for Windows 8.1 go here:
https://support.microsoft.com/en-us/help/4009470/windows-8-1-windows-server-2012-r2-update-history
application exception
file information
graphics component
internet explorer
kb4041693
kernel drivers
known issues
memory corruption
microsoft update catalog
microsoft windows
october 2017
rollup update
security
support
updates
user focus
webviewcontrol
windows 8.1
windows search
windows update