Linux Weekly News

Security updates have been issued by Fedora (oniguruma and thunderbird-enigmail), openSUSE (chromium, ghostscript, and slurm), Oracle (kernel), Red Hat (kpatch-patch), Slackware (bind), SUSE (python-ecdsa), and Ubuntu (bind9 and mariadb).

The LWN.net Weekly Edition for November 21, 2019 is available.

The idea of stacking (or chaining) Linux security modules (LSMs) goes back 15 years (at least) at this point; progress has definitely been made along the way, especially in the last decade or so. It has been possible to stack "minor" LSMs with one major LSM (e.g. SELinux, Smack, or AppArmor) for some time, but mixing, say, SELinux and AppArmor in the same system has not been possible. Combining major security solutions may not seem like a truly important feature, but there is a use case where it is pretty clearly needed: containers. Longtime LSM stacker (and Smack maintainer) Casey Schaufler gave a presentation at the 2019 Linux Security Summit Europe to report on the status and plans for allowing arbitrary LSM stacking.