ORACLE SQL updating left table from right table using bridge table

Question

This is a why-oh-why moment for me. I have a many-to-many relationship between tables A and B. Two columns in A need to be updated with two columns from B based on where the IDs match in bridge table C.

Any help is greatly appreciated.

Every script I've tried throws an error "single row query returns multiple rows".

Desired result is Reports.BU, Reports.AA = Assets.BU, Assets.AA where they match in Bridge. This is as far as I've gotten at this point.

UPDATE Reports 
SET (BU, AA) = (SELECT BU, AA 
                FROM (SELECT Bridge.Report.report_id,
                             Bridge.asset_id, 
                             Assets.BU, 
                             Assets.AA, 
                             MAX(Bridge.asset_id) 
                      FROM Bridge 
                      JOIN Asset
                        ON Asset.asset_id = Bridge.asset_id 
                      group by bridge.report_id, 
                               Bridge.asset_id, 
                               Asset.BU, 
                               Asset.AA) 
                WHERE report_id = Reports.report_id);