cgroup: cgroupgetfrom_id() must check the looked-up kn is a directory
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v6.0 by commit df02452f3df069a59bc9e69c84435bf115cb6e37, it was introduced in version v5.14 by commit 6b658c4863c15936872a93c9ee879043bf6393c9. For more details please see the references link.