Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-40226

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
10/04/2026
Last modified:
17/04/2026

Description

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

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
6.40
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* 233 (including) 257.12 (excluding)
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* 258 (including) 258.6 (excluding)
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* 259 (including) 259.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools