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01 Record

CVE-2022-3821

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

MediumPUBLISHEDCNA: redhat
CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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02 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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.42% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 36.9% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-14.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-11-08 00:00Z3 YR AGO
Last updated
2026-10-14 13:51Z15 DAYS AGO
Reserved
2022-11-02
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Medium (CVSS 5.5)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
Data version
5.2
Document digest
46d2dce47b8cbe79d46d6a9e6f17c9f7d69c7547dfe3b378ee5fd662559c872b

05 Affected products

VendorProductVersionsPlatforms
n/asystemdFixed in systemd v252-rc1—

06 References

07 Fixed in

AlmaLinux 8

  • systemd
    Fixed in 239-68.el8_7.1
  • systemd-container
    Fixed in 239-68.el8_7.1
  • systemd-devel
    Fixed in 239-68.el8_7.1
  • systemd-journal-remote
    Fixed in 239-68.el8_7.1
  • systemd-libs
    Fixed in 239-68.el8_7.1
  • systemd-pam
    Fixed in 239-68.el8_7.1
  • systemd-tests
    Fixed in 239-68.el8_7.1
  • systemd-udev
    Fixed in 239-68.el8_7.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • systemd
    Fixed in 250-12.el9_1.1
  • systemd-container
    Fixed in 250-12.el9_1.1
  • systemd-devel
    Fixed in 250-12.el9_1.1
  • systemd-journal-remote
    Fixed in 250-12.el9_1.1
  • systemd-libs
    Fixed in 250-12.el9_1.1
  • systemd-oomd
    Fixed in 250-12.el9_1.1
  • systemd-pam
    Fixed in 250-12.el9_1.1
  • systemd-resolved
    Fixed in 250-12.el9_1.1
  • systemd-rpm-macros
    Fixed in 250-12.el9_1.1
  • systemd-udev
    Fixed in 250-12.el9_1.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • systemd
    Fixed in 239-68.el8_7.1
  • systemd-container
    Fixed in 239-68.el8_7.1
  • systemd-devel
    Fixed in 239-68.el8_7.1
  • systemd-journal-remote
    Fixed in 239-68.el8_7.1
  • systemd-libs
    Fixed in 239-68.el8_7.1
  • systemd-pam
    Fixed in 239-68.el8_7.1
  • systemd-tests
    Fixed in 239-68.el8_7.1
  • systemd-udev
    Fixed in 239-68.el8_7.1

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • systemd
    Fixed in 250-12.el9_1.1
  • systemd-container
    Fixed in 250-12.el9_1.1
  • systemd-devel
    Fixed in 250-12.el9_1.1
  • systemd-journal-remote
    Fixed in 250-12.el9_1.1
  • systemd-libs
    Fixed in 250-12.el9_1.1
  • systemd-oomd
    Fixed in 250-12.el9_1.1
  • systemd-pam
    Fixed in 250-12.el9_1.1
  • systemd-resolved
    Fixed in 250-12.el9_1.1
  • systemd-rpm-macros
    Fixed in 250-12.el9_1.1
  • systemd-udev
    Fixed in 250-12.el9_1.1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • systemd
    Fixed in 251.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • systemd
    Fixed in 251.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • systemd
    Fixed in 251.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • systemd
    Fixed in 237-3ubuntu10.57

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • systemd
    Fixed in 245.4-4ubuntu3.20

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • systemd
    Fixed in 249.11-0ubuntu3.7

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • systemd
    Fixed in 204-5ubuntu20.31+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • systemd
    Fixed in 229-4ubuntu21.31+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.