Avast allows remote attackers to cause a denial of service (memory corruption) and possibly execute arbitrary code via a crafted PE file, related to authenticode parsing.
https://www.exploit-db.com/exploits/39530/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-4995
https://code.google.com/p/google-security-research/issues/detail?id=668
http://packetstormsecurity.com/files/136090/Avast-Authenticode-Parsing-Memory-Corruption.html