CVE-2026-40226
MEDIUM
6.4
CVSS Score
Published: April 10, 2026 at 03:18 PM UTC
Updated: June 17, 2026 at 10:44 AM UTC
2 products affected across 2 vendorsSystemdSystemd
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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.1%
SSVC
PoC
Description
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
233 ≤ v < 257.12258 ≤ v < 258.6259 ≤ v < 259.4
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor Advisory
Source: cverecord
https://github.com/systemd/systemd/security/advisories/GHSA-9mj4-rrc3-gjcxSSVC — Action Prioritization
SSVCPoCNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
6.4MEDIUMmitre
- Attack Vector
- LOCAL
- Complexity
- HIGH
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-348
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