A vulnerability in the PDF archive parsing module in Clam AntiVirus (ClamAV) Software versions 0.101 - 0.102.2 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a stack buffer overflow read. An attacker could exploit this vulnerability by sending a crafted PDF file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.
https://usn.ubuntu.com/4370-2/
https://usn.ubuntu.com/4370-1/
https://lists.debian.org/debian-lts-announce/2020/05/msg00018.html
https://blog.clamav.net/2020/05/clamav-01023-security-patch-released.html