Microsoft released a new CU for 1809 today (kb 4490481) and a new SSU (kb 4493510)
In my case neither one showed up when I checked for updates.
I manually installed the SSU from the windows update catalog and restarted my computer at that time the CU was offered thru windows update.
Both installed with no problems. The new 1809 version in now 17763.404
Barry
Barry
Windows 11 v23H2