A vulnerability in ClamAV versions prior to 0.100.2 could allow an attacker to cause a denial of service (DoS) condition. The vulnerability is due to an error related to the MEW unpacker within the "unmew11()" function (libclamav/mew.c), which can be exploited to trigger an invalid read memory access via a specially crafted EXE file.
https://www.flexera.com/company/secunia-research/advisories/SR-2018-23.html
https://usn.ubuntu.com/3789-2/
https://usn.ubuntu.com/3789-1/
https://security.gentoo.org/glsa/201904-12
https://secuniaresearch.flexerasoftware.com/advisories/83000/
https://lists.debian.org/debian-lts-announce/2018/10/msg00014.html