3490b541__String_Buzz___Chart_Of_Causes__Possible_Cause
[Symptom] Upper Fret Buzz Buzzes where the neck attaches to the body. Notes seem to fret out when playing near the body. [Remedy] Evaluate for dryness, humidify if necessary. Frets near f/b extension may need leveling. In rare cases the board must be planed to remove hump. [Possible Cause] 
Fingerboard On acoustics, section of fingerboard that is glued to the top may rise/fall with temperature/moisture extremes due to changes in the top. Fingerboard is warped in a way to render the end too high (most common on archtop's).
Why Is My Guitar Buzzing? How To Fix Fret / String Buzz | Chart Of Causes
Possible Cause