Provide references for CVE-2015-6839.
Where can I find more information about CVE-2015-6839?
References are available at: https://docs.google.com/document/d/1aH6kvoLR8O1qWOpEz89FAB2xFcBNB-QqHgZpXxg0vGE/preview?sle=true&pli=1, https://docs.google.com/document/d/13t1jqu-Upj4SyjYBMj3OMshdy6rGBrnb1R3P-goz-cs/edit?pli=1, https://www.eleccionesciudad.gob.ar/uploads/resoluciones/Informe_05-BALOTAJE-2015-07-17.pdf, https://www.youtube.com/watch?v=CTOCspLn6Zk.