Is CVE-2021-3997 actively exploited?

CVE-2021-3997 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-3997?

CVE-2021-3997 has a CVSS score of 5.5 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-3997?

Patch guidance is available from systemd project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-3997.

CVE-2021-3997 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-3997?

6 products: systemd project systemd, fedoraproject fedora, fedoraproject fedora, redhat enterprise linux, redhat enterprise linux, and 1 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-674 CWE-674

Metadata

Primary Vendor: SYSTEMD_PROJECT
Published: 8/23/2022
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

systemd_project : systemdfedoraproject : fedorafedoraproject : fedoraredhat : enterprise_linuxredhat : enterprise_linuxredhat : enterprise_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-3997. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-3997

View on NIST NVD

CVE-2021-3997 vulnerability