Package: libclamav9 Followup-For: Bug #1027010 I can confirm the same thing on my system (Debian/testing).
I see the following output via 'systemctl status clamav-daemon.service': systemd[1]: Started Clam AntiVirus userspace daemon. clamd[..]: LibClamAV Error: cli_loadinfo: Incorrect digital signature clamd[..]: LibClamAV Error: cli_loadinfo: Problem parsing database at line 25 clamd[..]: LibClamAV Error: Can't load daily.info: Malformed database clamd[..]: LibClamAV Error: cli_tgzload: Can't load daily.info clamd[..]: LibClamAV Error: Can't load /var/lib/clamav/daily.cld: Malformed database clamd[..]: LibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/daily.cld clamd[..]: Mon Dec 26 12:09:32 2022 -> !Malformed database systemd[1]: clamav-daemon.service: Main process exited, code=exited, status=1/FAILURE systemd[1]: clamav-daemon.service: Failed with result 'exit-code'. And downgrading the package to version 0.103.7+dfsg-1+b1 indeed resolves it. Best regards, Timo