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Release Notes: ImunifyAV(+) v5.3 beta

Oct 7, 2020 1:47:26 PM / by Dmitry Tkachuk



We’re pleased to announce that a new beta version of ImunifyAV, version 5.3, is now available. The following features are new in the v5.3 beta release:

  • cgroups for Malware Scanner
    Extended resource limitation mechanics supports cgroups providing better control over resources in the  Malware Scanner on CentOS 7, 8 and Ubuntu.

Let’s review the changes. 

cgroups for Malware Scanner

ImunifyAV v5.3 utilizes cgroups for the CPU and IO resource management during on-demand and background scans. It limits file-system and CPU load according to configured “intensity level” avoiding spikes and smoothly spreading the load.

That is useful for non-CloudLinux OS systems where LVE is not available. Earlier CentOS 7/8 systems required CFQ scheduler to be available for ionice priorities schedule. Now, ImunifyAV v5.3 doesn’t depend on CFQ. Further installations on Debian systems will also rely on cgroups support for resource management.

Additional information

ImunifyAV v5.3 includes 30 tasks and 11 bug fixes.

Internal records

Important tasks and issues linked to support tickets.


Greatly improved detection rate and malicious code deobfuscator.


Improved handling of messages from AI-Bolit.
DEF-13812 Extended commands in ImunifyAV(+). “malware rebuild patterns” - now available.
DEF-13208 Improved AI-Bolit performance by the file filtering mechanics improvement.

Stay in touch

Please give our product team feedback on this version 5.3 release, or share your ideas and feature requests via feedback@imunify360.com.

If you encounter any problems with this beta release, please send a comment or request to our Imunify support team via cloudlinux.zendesk.com.

How to install

To install the new ImunifyAV(+) beta v.5.3, follow the instructions in the documentation.

How to upgrade

To upgrade ImunifyAV(+) on CentOS/CloudLinux systems, run the command:

yum update imunify-antivirus --enablerepo=imunify360-testing

To upgrade Imunify360 on Ubuntu 16.04, run the following command:

echo 'deb https://repo.imunify360.cloudlinux.com/imunify360/ubuntu-testing/16.04/ xenial main'  > /etc/apt/sources.list.d/imunify360-testing.list
apt-get update
apt-get install --only-upgrade imunify-antivirus

To upgrade Imunify360 on Ubuntu 18.04, run the following command:

echo 'deb https://repo.imunify360.cloudlinux.com/imunify360/ubuntu-testing/18.04/ bionic main'  > /etc/apt/sources.list.d/imunify360-testing.list
apt-get update
apt-get install --only-upgrade imunify-antivirus

Topics: ImunifyAV, beta, Release

Dmitry Tkachuk

Written by Dmitry Tkachuk

Imunify Security, Product Manager

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