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.
Problem types
Product status
Timeline
| 2026-03-13: | Reported to Red Hat. |
| 2026-03-13: | Made public. |
Credits
Red Hat would like to thank Asim Viladi Oglu Manizada for reporting this issue.
References
access.redhat.com/security/cve/CVE-2026-4105
bugzilla.redhat.com/show_bug.cgi?id=2447262 (RHBZ#2447262)
github.com/...ystemd/security/advisories/GHSA-4h6x-r8vx-3862