CVE-2026-4105
Received Received - Intake
Improper Access Control in systemd-machined Enables Root Execution

Publication date: 2026-03-13

Last updated on: 2026-04-30

Assigner: Red Hat, Inc.

Description
A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.
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Meta Information
Published
2026-03-13
Last Modified
2026-04-30
Generated
2026-06-16
AI Q&A
2026-03-13
EPSS Evaluated
2026-06-15
NVD
CVE-2026-4105
EUVD
EUVD-2026-11774
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
systemd systemd From 259 (inc)
systemd systemd From 259.4 (inc)
systemd systemd to 260 (inc)
systemd systemd *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
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Executive Summary

This vulnerability exists in the systemd-machined service of systemd. It is caused by improper access control due to insufficient validation of the class parameter in the RegisterMachine D-Bus method.

A local unprivileged user can exploit this flaw by registering a machine with a specific class value, which may result in leaving behind a usable, attacker-controlled machine object.

This allows the attacker to invoke methods on a privileged object, ultimately enabling the execution of arbitrary commands with root privileges on the host system.

Impact Analysis

Exploitation of this vulnerability can lead to an attacker gaining root-level access on the affected system.

With root privileges, the attacker can execute arbitrary commands, potentially compromising the entire system, accessing sensitive data, modifying system configurations, or disrupting services.

Compliance Impact

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