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USN-5233-1: ClamAV vulnerability

18 January 2022

ClamAV could be made to crash if it opened a specially crafted file.



  • clamav - Anti-virus utility for Unix


It was discovered that ClamAV incorrectly handled memory when the
CL_SCAN_GENERAL_COLLECT_METADATA scan option was enabled. A remote attacker
could possibly use this issue to cause ClamAV to crash, resulting in a
denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.10
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary


Related notices

  • USN-5233-2: clamav-base, clamav, clamav-docs, libclamav9, clamav-freshclam, clamav-daemon, clamav-milter, clamav-testfiles, libclamav-dev, clamdscan