CVE-2022-3821: fedoraproject fedora Off-by-one Error
CVSS: 5.5v3.1MediumModified
AliasesMGASA-2022-0429SUSE-SU-2022:3999-1SUSE-SU-2022:4056-1SUSE-SU-2022:4279-1SUSE-SU-2025:20041-1RHSA-2023:0100RHSA-2023:0336UBUNTU-CVE-2022-3821DEBIAN-CVE-2022-3821DLA-3474-1openSUSE-SU-2024:13366-1CGA-cv39-953v-fvjgCGA-fffg-v33h-c9wfCGA-gg77-h5xg-q6r9CGA-hh74-jpr4-jcp8CGA-qfgc-58rg-qjggCGA-vgc3-h77p-27j7CGA-w3cq-x5cj-jcfvCGA-w62f-wqxm-9rcwCGA-w9ff-8wcf-cqqrCGA-wmrx-jfp5-jc6g
Published 08-11-2022Last modified 14-10-2026
Vulnerability summary
CVE-2022-3821 is a medium (CVSS 5.5) Off-by-one Error vulnerability in fedoraproject fedora. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.7% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.43%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 08-11-2022PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
6 scores · 6 sources · 1 versionMedium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 6 agree
- OSV · Red hatEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
+0.01 pp
From 0.42% on 19-09-2026
19-09-202619-10-2026
EPSS score0.43%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundSystemd
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Redhat25 products
- enterprise_linux8.0 | 9.0
- systemd< 0:239-68.el8_7.1 | < 0:250-12.el9_1.1
- systemd-container< 0:239-68.el8_7.1 | < 0:250-12.el9_1.1
- systemd-container-debuginfo< 0:239-68.el8_7.1 | < 0:250-12.el9_1.1
- systemd-debuginfo< 0:239-68.el8_7.1 | < 0:250-12.el9_1.1
Suse9 products
- systemd&distro=SUSE Linux Enterprise Micro 5.1< 246.16-150300.7.54.1
- systemd&distro=SUSE Linux Enterprise Micro 5.2< 246.16-150300.7.54.1
- systemd&distro=SUSE Linux Enterprise Micro 5.3< 249.12-150400.8.13.1
- systemd&distro=SUSE Linux Enterprise Module for Basesystem 15 SP3< 246.16-150300.7.54.1
- systemd&distro=SUSE Linux Enterprise Module for Basesystem 15 SP4< 249.12-150400.8.13.1
Chainguard5 products
- py3-systemdAll versions (No fix recorded)
- py3.10-systemdAll versions (No fix recorded)
- py3.11-systemdAll versions (No fix recorded)
- py3.12-systemdAll versions (No fix recorded)
- py3.13-systemdAll versions (No fix recorded)
Opensuse4 products
- systemd&distro=openSUSE Leap 15.3< 246.16-150300.7.54.1
- systemd&distro=openSUSE Leap 15.4< 249.12-150400.8.13.1 | < 246.16-150300.7.54.1
- systemd&distro=openSUSE Leap Micro 5.2< 246.16-150300.7.54.1
- systemd&distro=openSUSE Tumbleweed< 254.5-3.1
Debian1 product
- systemd< 241-7~deb10u10 | < 251.3-1
Fedoraproject1 product
- fedoraEOL35
Mageia1 product
- systemd< 246.16-3.mga8
Systemd_project1 product
- systemd≤ 251
Ubuntu1 product
- systemd< 204-5ubuntu20.31+esm2 | < 229-4ubuntu21.31+esm3 | < 237-3ubuntu10.57 | < 245.4-4ubuntu3.20 | < 249.11-0ubuntu3.7
9 vendors · 48 products
References
44 links- github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4eFIXPatchThird Party Advisory
