AppArmor 4.0 is a major new release of the AppArmor that is in development, these are not complete release notes of everything in beta2 but just highlighting new or important developments

Apprmor 4.0 is a bridge release between older AppArmor 3.x policy and the newer AppArmor 4 style policy which introduces several new features that are not backwards compatible. As such AppArmor 4.0 will be a short lived release, and will not receive long term support. The following AppArmor 4.1 feature release is planned to be a regular release, please take this into account when including AppArmor 4.0 into a distro release. For questions around compatibility see the compatibility matrix.

Note

This release only contains bug fixes to AppArmor 4.0 beta1

• Some features will work with older kernels but many of the features in apparmor 4 with require a development kernel.
• The kernel portion of the project is maintained and pushed separately.
• AppArmor 4.0 contains all bug fixes and policy updates from apparmor 3.1
• Some new features will not be fully supported in some utilities. In these cases it was decided that releasing a new feature earlier had more benefit than delaying it for full utility support. Please see the feature support matrix.

Obtaining the Release

There are two ways to obtain this release either through gitlab or a tarball in launchpad.

Important note: the gitlab release tarballs differ from the launchpad release tarballs. The launchpad release tarball has a couple processing steps already performed:

• libapparmor autogen.sh is already done, meaning distros only need to use ./configure in their build setup
• the docs for everything but libapparmor have already been built

gitlab

• https://gitlab.com/apparmor/apparmor/-/releases/v4.0.0-beta2