Linux kernel 5.8 introduced a new vulnerability that allows privilege escalation. If you've upgraded to a new Samsung Galaxy S22 or a Google Pixel 6 you're vulnerable. This affects Linux servers as well and according to Red Hat, as of March 7th: "Currently there is no mitigation available for this flaw."
https://www.openwall.com/lists/oss-security/2022/03/07/1

