CVE-2021-3997

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-25)

CWE

CWE-674

Published

2022-08-23

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• redhat:enterprise_linux
• systemd_project:systemd

References

• https://access.redhat.com/security/cve/CVE-2021-3997
• https://bugzilla.redhat.com/show_bug.cgi?id=2024639
• https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1
• https://security.gentoo.org/glsa/202305-15
• https://www.openwall.com/lists/oss-security/2022/01/10/2

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