CVE-2021-3997

Published: Aug 23, 2022Modified: Jun 17, 2026

5.5

Vector

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

Exploitability: 1.8 / Impact: 3.6

Source: NVD

Description

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 (6)

Products: Systemd Project: Systemd · Fedoraproject: Fedora · Redhat: Enterprise Linux

1 product

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Systemd Project Systemd	From 240 to 250.2

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 34
Fedoraproject Fedora	Version 35

Configuration C

3 vulnerable

Vulnerable Software	Affected Versions
Redhat Enterprise Linux	Version 7.0
Redhat Enterprise Linux	Version 8.0
Redhat Enterprise Linux	Version 9.0

Related CWEs

CWE-674

Uncontrolled Recursion

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

References (10)

https://access.redhat.com/security/cve/CVE-2021-3997

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2024639

Source: secalert@redhat.com

Issue TrackingPatchThird Party Advisory

https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

Source: secalert@redhat.com

PatchThird Party Advisory

https://security.gentoo.org/glsa/202305-15

Source: secalert@redhat.com

https://www.openwall.com/lists/oss-security/2022/01/10/2

Source: secalert@redhat.com

ExploitMailing ListThird Party Advisory

https://access.redhat.com/security/cve/CVE-2021-3997