A flaw was found in Kubernetes, where the amount of disk space the /etc/hosts file can use is unconstrained. This flaw can allow attacker-controlled pods to cause a denial of service if they have permission to write to the node's /etc/hosts file.

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8557
https://www.openwall.com/lists/oss-security/2020/07/15/4