systemd up to 259 nspawn less trusted source

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in systemd up to 259 and classified as critical. The affected element is an unknown function of the component nspawn. Performing a manipulation results in less trusted source. This vulnerability is known as CVE-2026-40226. Attacking locally is a requirement. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in systemd up to 259. This affects an unknown part of the component nspawn. The manipulation with an unknown input leads to a less trusted source vulnerability. CWE is classifying the issue as CWE-348. The product has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-40226 since 04/10/2026. The exploitability is told to be difficult. Attacking locally is a requirement. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 307029 (Linux Distros Unpatched Vulnerability : CVE-2026-40226), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 260 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (307029) and CERT Bund (WID-SEC-2026-0720). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • SUSE Linux
  • Open Source systemd

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.4
VulDB Temp Score: 6.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Less trusted source
CWE: CWE-348
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 307029
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-40226

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: systemd 260

Timelineinfo

04/10/2026 Advisory disclosed
04/10/2026 +0 days CVE reserved
04/10/2026 +0 days VulDB entry created
04/18/2026 +8 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-40226 (🔒)
GCVE (CVE): GCVE-0-2026-40226
GCVE (VulDB): GCVE-100-356835
CERT Bund: WID-SEC-2026-0720 - systemd: Mehrere Schwachstellen

Entryinfo

Created: 04/10/2026 17:52
Updated: 04/18/2026 11:49
Changes: 04/10/2026 17:52 (62), 04/13/2026 10:18 (7), 04/18/2026 11:49 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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