ClamAV versions prior to 0.101.3 are susceptible to a zip bomb vulnerability where an unauthenticated attacker can cause a denial of service condition by sending crafted messages to an affected system.
https://blog.clamav.net/2019/08/clamav-01014-security-patch-release-has.html
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00078.html