It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service (memory exhaustion).
5.11.0-1021.22~20.04.25.11.0-1021.22~20.04.15.11.0-1022.24~20.04.15.11.0-40.44~20.04.25.13.0-1019.235.11.0-1021.22~20.04.1