CVE-2026-40226

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

10/04/2026

Last modified:

10/04/2026

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

References to Advisories, Solutions, and Tools

https://github.com/systemd/systemd/security/advisories/GHSA-9mj4-rrc3-gjcx