linux is vulnerable to privilege escalation. The vulnerability exists due to a type confusion in kernel/bpf/verifier.c.
git://git.launchpad.net/ubuntu-cve-tracker/tree/active/CVE-2021-33624
www.openwall.com/lists/oss-security/2021/06/21/1
github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db
lists.debian.org/debian-lts-announce/2021/10/msg00010.html
www.usenix.org/conference/usenixsecurity21/presentation/kirzner