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Full vulnerability report · 2022
CVE-2022-3821High confidence

An attacker could supply specific values for time and accuracy that leads to buffer overrun in format_timespan(), leading to a Denial of Service

Unknown · systemd

Official source article: Siemens SSA-398330 ↗. Check the applicable product and release in the original source.

5.5MediumCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 5 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.42% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown systemd and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 5 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

4 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcesystemdVendor fix publishedDebian records a fixed source-package version for this release.251.3-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcesystemdVendor fix publishedDebian records a fixed source-package version for this release.251.3-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcesystemdVendor fix publishedDebian records a fixed source-package version for this release.251.3-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcesystemdVendor fix publishedDebian records a fixed source-package version for this release.251.3-1Debian Security Tracker ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

2 current
CVE-2022-3821 · CSAF 2.0 · revision 66 · interimSUSE Product Security TeamCVE-2022-3821
16 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • systemd as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • SLES 15 SP1 CHOST Images for Amazon EC2
  • SLES 15 SP2 CHOST Images for Amazon EC2
  • SLES 15 SP3 CHOST Images for Amazon EC2
  • SLES 15 SP4 CHOST Images for Amazon EC2
  • SLES 15 SP5 CHOST Images for Amazon EC2
  • SLES 15 SP1 CHOST Images for Google
  • SLES 15 SP2 CHOST Images for Google
  • SLES 15 SP3 CHOST Images for Google
  • SLES 15 SP4 CHOST Images for Google
  • SLES 15 SP5 CHOST Images for Google
  • SLES 15 SP1 CHOST Images for Microsoft Azure
Summary
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.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
SSA-398330 · CSAF 2.0 · revision 18 · interimSiemens ProductCERTSSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)
  • SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
Summary
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.
Remediation
Update to V3.1.5 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2022-43162

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 5 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

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.

What

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.

Why

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

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.

Why

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Off-by-one Error → disrupt the affected service
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-193 ↗

CWE-193: Off-by-one Error. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Denial of serviceCWE-193Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-0794Dell ECS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell ECS ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, Dateien zu manipulieren, einen Cross-Site-Scripting-Angriff durchzuführen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service Zustand herbeizuführen.

Official advisory ↗
BSI · German · WID-SEC-2023-1542Red Hat OpenShift: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um einen Denial of Service Zustand herbeizuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2022-2012systemd: Schwachstelle ermöglicht Denial of Service

Ein lokaler Angreifer kann eine Schwachstelle in systemd ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20221109Security Bulletin 09 Nov 2022

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 09 Nov 2022, published on 9 November 2022. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0281Multiples vulnérabilités dans les produits Splunk

d?id=CVE-2021-33910 Référence CVE CVE-2021-35937 https://www.cve.org/CVERecord?id=CVE-2021-35937 Référence CVE CVE-2021-35938 https://www.cve.org/CVERecord?id=CVE-2021-35938 Référence CVE CVE-2021-35939 https://www.cve.org/CVERecord?id=CVE-2021-35939 Référence CVE CVE-2021-46877 https://www.cve.org/CVERecord?id=CVE-2021-46877 Référence CVE CVE-2022-23302 https://www.cve.org/CVERecord?id=CVE-2022-23302 Référence CVE CVE-2022-23305 https://www.cve.org/CVERecord?id=CVE-2022-23305 Référence CVE CVE-2022-23307 https://www.cve.org/CVERecord?id=CVE-2022-23307 Référence CVE CVE-2022-31159 https://www.cve.org/CVERecord?id=CVE-2022-31159 Référence CVE CVE-2022-3821 https://www.cve.org/CVERecord?id=CVE-2022-3821 Référence CVE CVE-2022-42003 https://www.cve.org/CVERecord?id=CVE-2022-42003 Référence CVE CVE-2022-42004 https://www.cve.org/CVERecord?id=CVE-2022-42004 Référence CVE CVE-2023-26118 https://www.cve.org/CVERecord?id=CVE-2023-26118 Référence CVE CVE-2023-26464 https://www.cve.org/CVERecord?id=CVE-2023-26464 Référence CVE CVE-2023-26604 https://www.cve.org/CVERecord?id=CVE-2023-26604 Référence CVE CVE-2023-33201 https://www.cve.org/CVERecord?id=CVE-2023-33201 Référence CVE CVE-2023-33202 https://www.cve.org/CVERecord?id=CVE-2023-33202 Référence CVE CVE-2023-44487 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

CVERecord?id=CVE-2022-36087 Référence CVE CVE-2022-36227 https://www.cve.org/CVERecord?id=CVE-2022-36227 Référence CVE CVE-2022-3626 https://www.cve.org/CVERecord?id=CVE-2022-3626 Référence CVE CVE-2022-3627 https://www.cve.org/CVERecord?id=CVE-2022-3627 Référence CVE CVE-2022-3715 https://www.cve.org/CVERecord?id=CVE-2022-3715 Référence CVE CVE-2022-37434 https://www.cve.org/CVERecord?id=CVE-2022-37434 Référence CVE CVE-2022-37454 https://www.cve.org/CVERecord?id=CVE-2022-37454 Référence CVE CVE-2022-3786 https://www.cve.org/CVERecord?id=CVE-2022-3786 Référence CVE CVE-2022-37967 https://www.cve.org/CVERecord?id=CVE-2022-37967 Référence CVE CVE-2022-3821 https://www.cve.org/CVERecord?id=CVE-2022-3821 Référence CVE CVE-2022-38476 https://www.cve.org/CVERecord?id=CVE-2022-38476 Référence CVE CVE-2022-39046 https://www.cve.org/CVERecord?id=CVE-2022-39046 Référence CVE CVE-2022-3996 https://www.cve.org/CVERecord?id=CVE-2022-3996 Référence CVE CVE-2022-40090 https://www.cve.org/CVERecord?id=CVE-2022-40090 Référence CVE CVE-2022-40303 https://www.cve.org/CVERecord?id=CVE-2022-40303 Référence CVE CVE-2022-40304 https://www.cve.org/CVERecord?id=CVE-2022-40304 Référence CVE CVE-2022-40674 https://www.cve.org/CVERecord?id=CVE-2022-40674 Référence CVE CVE-2022-40897 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-1015Multiples vulnérabilités dans les produits Siemens

ord?id=CVE-2022-32207 Référence CVE CVE-2022-32208 https://www.cve.org/CVERecord?id=CVE-2022-32208 Référence CVE CVE-2022-32221 https://www.cve.org/CVERecord?id=CVE-2022-32221 Référence CVE CVE-2022-35252 https://www.cve.org/CVERecord?id=CVE-2022-35252 Référence CVE CVE-2022-35260 https://www.cve.org/CVERecord?id=CVE-2022-35260 Référence CVE CVE-2022-35737 https://www.cve.org/CVERecord?id=CVE-2022-35737 Référence CVE CVE-2022-3715 https://www.cve.org/CVERecord?id=CVE-2022-3715 Référence CVE CVE-2022-37434 https://www.cve.org/CVERecord?id=CVE-2022-37434 Référence CVE CVE-2022-37454 https://www.cve.org/CVERecord?id=CVE-2022-37454 Référence CVE CVE-2022-3821 https://www.cve.org/CVERecord?id=CVE-2022-3821 Référence CVE CVE-2022-40303 https://www.cve.org/CVERecord?id=CVE-2022-40303 Référence CVE CVE-2022-40304 https://www.cve.org/CVERecord?id=CVE-2022-40304 Référence CVE CVE-2022-40674 https://www.cve.org/CVERecord?id=CVE-2022-40674 Référence CVE CVE-2022-42784 https://www.cve.org/CVERecord?id=CVE-2022-42784 Référence CVE CVE-2022-42898 https://www.cve.org/CVERecord?id=CVE-2022-42898 Référence CVE CVE-2022-42915 https://www.cve.org/CVERecord?id=CVE-2022-42915 Référence CVE CVE-2022-42916 https://www.cve.org/CVERecord?id=CVE-2022-42916 Référence CVE CVE-2022-4304 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0210Multiples vulnérabilités dans le noyau Linux d'Ubuntu

ve.org/CVERecord?id=CVE-2022-3521 Référence CVE CVE-2022-3545 https://www.cve.org/CVERecord?id=CVE-2022-3545 Référence CVE CVE-2022-3623 https://www.cve.org/CVERecord?id=CVE-2022-3623 Référence CVE CVE-2022-3628 https://www.cve.org/CVERecord?id=CVE-2022-3628 Référence CVE CVE-2022-36280 https://www.cve.org/CVERecord?id=CVE-2022-36280 Référence CVE CVE-2022-3640 https://www.cve.org/CVERecord?id=CVE-2022-3640 Référence CVE CVE-2022-3643 https://www.cve.org/CVERecord?id=CVE-2022-3643 Référence CVE CVE-2022-3646 https://www.cve.org/CVERecord?id=CVE-2022-3646 Référence CVE CVE-2022-3649 https://www.cve.org/CVERecord?id=CVE-2022-3649 Référence CVE CVE-2022-3821 https://www.cve.org/CVERecord?id=CVE-2022-3821 Référence CVE CVE-2022-39842 https://www.cve.org/CVERecord?id=CVE-2022-39842 Référence CVE CVE-2022-41218 https://www.cve.org/CVERecord?id=CVE-2022-41218 Référence CVE CVE-2022-4139 https://www.cve.org/CVERecord?id=CVE-2022-4139 Référence CVE CVE-2022-41849 https://www.cve.org/CVERecord?id=CVE-2022-41849 Référence CVE CVE-2022-41850 https://www.cve.org/CVERecord?id=CVE-2022-41850 Référence CVE CVE-2022-41858 https://www.cve.org/CVERecord?id=CVE-2022-41858 Référence CVE CVE-2022-42328 https://www.cve.org/CVERecord?id=CVE-2022-42328 Référence CVE CVE-2022-42329 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2022-020572systemd project の systemd 他複数ベンダの製品における境界条件の判定に関する脆弱性

systemd project の systemd 他複数ベンダの製品には、境界条件の判定に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Update to V3.1.5 or later version
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 8 Nov 2022 · Last source change 2 May 2025, 18:12 UTC · CWE-193 · Off-by-one Error

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2022-43162
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    Fixed in systemd v252-rc1 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    Fixed in systemd v252-rc1 · Fixed: Update to V3.1.5 or later version
    Siemens ProductCERT ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2022-43162↗Vendor CSAF · SUSE Product Security Team↗Siemens ProductCERT security advisory · Siemens SSA-398330↗Patch or update reference↗Patch or update reference↗CVE authority or vendor reference↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2022-3821 · cve.blacktree.nl