The Arch Linux security team has released the following advisories regarding all variants of the default Linux packages shipped in both Arch and Crystal. Unless you use a custom kernel or from the AUR, you will need to follow the steps in the relevant link below.
linux: https://security.archlinux.org/ASA-202210-2/generate
linux-zen: https://security.archlinux.org/ASA-202210-4/generate
linux-lts: https://security.archlinux.org/ASA-202210-3/generate
linux-hardened: https://security.archlinux.org/ASA-202210-1/generate
