Lynis Security Controls

PROC-3612 - Zombie processes


This control tests for zombie processes



How to solve

Zombie processes are in an "undead" status. This means they ended, but were not properly terminated by the kernel. Sometimes it is a matter of waiting, before they disappear. If you got many zombie processes, there might be a specific cause. This is usually related to a software package and how it behaves. An update might solve the issue, especially if more people encountered it as well.

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Linux and Unix System Hardening

This information is provided as part of the Lynis community project. It is related to Lynis control PROC-3612. All information should be considered as-is, without guarantees. Any advice or snippets should be tested before implementing in production environments.


Lynis is a technical security audit tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. The project has an active community, including open development via GitHub.

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