A ClamAV security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.04. and 21.10.

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Ubuntu Security Notice USN-5233-1
January 18, 2022

clamav vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

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

Software Description:
- clamav: Anti-virus utility for Unix

Details:

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:
clamav 0.103.5+dfsg-1~21.10.1

Ubuntu 21.04:
clamav 0.103.5+dfsg-1~21.04.1

Ubuntu 20.04 LTS:
clamav 0.103.5+dfsg-1~20.04.1

Ubuntu 18.04 LTS:
clamav 0.103.5+dfsg-0ubuntu0.18.04.1

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

References:
  https://ubuntu.com/security/notices/USN-5233-1
CVE-2022-20698

Package Information:
  https://launchpad.net/ubuntu/+source/clamav/0.103.5+dfsg-1~21.10.1
  https://launchpad.net/ubuntu/+source/clamav/0.103.5+dfsg-1~21.04.1
  https://launchpad.net/ubuntu/+source/clamav/0.103.5+dfsg-1~20.04.1
  https://launchpad.net/ubuntu/+source/clamav/0.103.5+dfsg-0ubuntu0.18.04.1