This new patch for Server 10.5:
ArcGIS Server 10.5 Layer Definition Query Patch
is not shown on the main support page for ArcGIS Server 10.5:
Esri Support 10.5
Is there a reason for this, or will the latter page eventually be updated to show the new patch?
Note that the new patch does appear normally in the "Check for Updates" program (ArcGIS Enterprise Patch Notification) associated with ArcGIS Server 10.5 (that's how I found the patch).