Since 2020, BPF programs have been able to
act as Linux security modules
(LSMs). Several projects, including systemd, have been working to use
that capability to provide more security to users. Christian Brauner
spoke at the 2026
Linux Storage, Filesystem, Memory-Management, and BPF Summit
about some of the limitations of using BPF in this way, and the changes he would like to see for systemd's use. In particular, he would like a way to make
sure that BPF programs cannot be removed or have their private data tampered with.
https://lwn.net/Articles/1082111/
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