Systemd Nspawn Vulnerability in Specific Versions
CVE-2026-40226

6.4MEDIUM

Key Information:

Vendor

Systemd

Status
Systemd
Vendor
CVE Published:
10 April 2026

What is CVE-2026-40226?

A vulnerability exists in the nspawn component of systemd versions 233 through 259, where a specially crafted optional configuration file can trigger an escape-to-host action. This flaw may allow malicious configurations to bypass container isolation, potentially leading to unauthorized access to the host system.

Affected Version(s)

systemd 233 < 260

References

https://github.com/systemd/systemd/security/advisories/GH...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.