The patch was released on the 22nd, from http://googleprojectzero.blogspot.co.uk/2015/06/analysis-and-exploitation-of-eset.html: "ESET released an update to their scan engine on 22-Jun-2015."
But even if it was 3 months ago, it was still made public on day 4 of the 90 day timescale which isn't a huge amount of time for testing.