Going back about a half-decade has been the Landlock Linux Security Module (LSM) as a means of allowing even unprivileged processes to create “powerful security” sandboxes. After a number of rounds of reviews and revisions over the year, Landlock has finally been mainlined for Linux 5.13!..

Source: Phoronix – “Landlock” Lands In Linux 5.13 For Unprivileged Application Sandboxing