Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2022-3821

CVE-2022-3821MEDIUM

n/a systemd — An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0043   35.7     —

AFFECTED
  Product  Versions                     Fixed
  systemd  Fixed in systemd v252-rc1 –  —

TIMELINE
  Nov 2   Reserved by redhat
  Nov 8   Published (CNA: redhat)
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-3821 (systemd). Public exploit reference added.

CWE-193 · CNA: redhat · CVSS v3.1 · 8 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 2, 2022	Reserved	Reserved by redhat
November 8, 2022	Published	Published (CNA: redhat)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-3821 (systemd). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	systemd	—	Fixed in systemd v252-rc1	—

Weaknesses

CWE-193

References (8)

https://bugzilla.redhat.com/show_bug.cgi?id=2139327 [Issue Tracking, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4e [Patch, Third Party Advisory]
https://github.com/systemd/systemd/issues/23928 [Exploit, Issue Tracking, Third Party Advisory]
https://github.com/systemd/systemd/pull/23933 [Patch, 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

Authoritative record: CVE-2022-3821 at cve.org

Weaknesses: CWE-193

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-3821 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.