You can read more here [ALERT] Dirty Frag (CVE-2026-43284, CVE-2026-43500) - Root Privilege Vulnerability - Announcements - Manjaro Linux Forum
In short do these in a terminal:
sudo sh -c "printf 'install esp4 /bin/false\ninstall esp6 /bin/false\ninstall rxrpc /bin/false\n' > /etc/modprobe.d/dirtyfrag.conf; rmmod esp4 esp6 rxrpc 2>/dev/null; true"
And:
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
Just to be safe!