The SCTP socket buffer used by a userspace application is not accounted by the cgroups subsystem. An attacker can use this flaw to cause a denial of service attack. Kernel 3.10.x and 4.18.x branches are believed to be vulnerable.
https://www.oracle.com/security-alerts/cpuApr2021.html
https://usn.ubuntu.com/3982-2/
https://usn.ubuntu.com/3982-1/
https://usn.ubuntu.com/3981-2/
https://usn.ubuntu.com/3981-1/
https://usn.ubuntu.com/3980-2/
https://usn.ubuntu.com/3980-1/
https://usn.ubuntu.com/3979-1/
https://security.netapp.com/advisory/ntap-20190411-0003/
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3874