Uncontrolled recursion in systemd's systemd-tmpfiles https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1 CREATE(Triage):(User=admin) CVE-2021-3997 (https://nvd.nist.gov/vuln/detail/CVE-2021-3997)