In the Linux kernel, the following vulnerability has been resolved: cgroup: cgroup_get_from_id() must check the looked-up kn is a directory cgroup has to be one kernfs dir, otherwise kernel panic is caused, especially cgroup id is provide from userspace.
git.kernel.org/linus/df02452f3df069a59bc9e69c84435bf115cb6e37
git.kernel.org/stable/c/1e9571887f97b17cf3ffe9aa4da89090ea60988b
git.kernel.org/stable/c/8484a356cee8ce3d6a8e6266ff99be326e9273ad
git.kernel.org/stable/c/df02452f3df069a59bc9e69c84435bf115cb6e37
ubuntu.com/security/CVE-2022-48638
www.cve.org/CVERecord?id=CVE-2022-48638