This means that it includes all the security and software updates that have been released from September 10th when Debian GNU/Linux 11.5 was released until today, through the main Debian GNU/Linux 11 “Bullseye” software repositories.
In numbers, Debian GNU/Linux 11.6 includes a total of 78 security updates and 69 miscellaneous bug fixes. For more details about these fixes, you can study the release announcement page. But if you’re already running Debian GNU/Linux 11 “Bullseye,” you only have to make sure your installation is up to date to receive these fixes.
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