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Vulnerabilities CVE-2026-4105

CVE-2026-4105

Medium
Open
TLP:CLEAR

Systemd: systemd: privilege escalation via improper access control in registermachine d-bus method

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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.

Details

CVSS Score
6.7
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Confidence
90%
Published
Mar 13, 2026
Last Modified
Aug 21, 2026
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