linux is vulnerable to privilege escalation. The vulnerability exists due to a memory leak flaw in shmget() which are aligned to PUD alignment with the fault of some of the memory pages.
git://git.launchpad.net/ubuntu-cve-tracker/tree/active/CVE-2021-4002
bugzilla.redhat.com/show_bug.cgi?id=2025726
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890
lists.debian.org/debian-lts-announce/2022/03/msg00011.html
lists.debian.org/debian-lts-announce/2022/03/msg00012.html
www.debian.org/security/2022/dsa-5096
www.openwall.com/lists/oss-security/2021/11/25/1
www.oracle.com/security-alerts/cpujul2022.html