CVE-2021-3997: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 1.7% chance of exploitation in the next 30 days.

A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.

Affected products

• Fedoraproject Fedora: version 34 only; version 35 only
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Systemd Project Systemd: from 240, before 250.2 (fixed in 250.2)

Published 2022-08-23. Last modified 2026-06-17.