CVE-2022-3821

Name: CVE-2022-3821
Creator: NVD / NIST
Published: 2022-11-08T22:15:16.7+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2022-3821 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c. An attacker could supply specific values for time and accuracy that leads to buffer overrun in format_timespan(), leading to a Denial of Service.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c. An attacker could supply specific values for time and accuracy that leads to buffer overrun in format_timespan(), leading to a Denial of Service.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.42%

33.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-193

Affected Software

Vendor	Product	Versions
Systemd Project	Systemd	<= 251
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0
Fedoraproject	Fedora	35

References

https://bugzilla.redhat.com/show_bug.cgi?id=2139327Issue Tracking, Third Party Advisory
https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4ePatch, Third Party Advisory
https://github.com/systemd/systemd/issues/23928Exploit, Issue Tracking, Third Party Advisory
https://github.com/systemd/systemd/pull/23933Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00036.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RVBQC2VLSDVQAPJTEMTREXDL4HYLXG2P/
https://security.gentoo.org/glsa/202305-15
https://bugzilla.redhat.com/show_bug.cgi?id=2139327Issue Tracking, Third Party Advisory
https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4ePatch, Third Party Advisory
https://github.com/systemd/systemd/issues/23928Exploit, Issue Tracking, Third Party Advisory
https://github.com/systemd/systemd/pull/23933Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00036.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RVBQC2VLSDVQAPJTEMTREXDL4HYLXG2P/
https://security.gentoo.org/glsa/202305-15

Timeline

Published: Nov 8, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-3821?

How severe is CVE-2022-3821?

CVE-2022-3821 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2022-3821?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-3821?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST