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.

Affected: openEuler:24.03-LTS-SP2: systemd

systemd is a system and service manager that runs as PID 1 and starts the rest of the system. Security Fix(es):

systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.(CVE-2026-29111)

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.(CVE-2026-4105)

libsystemd0-259.5-1.3 on GA media

systemd: systemd: Privilege escalation via improper access control in RegisterMachine D-Bus method systemd: systemd: Arbitrary code execution or Denial of Service via spurious IPC API call data systemd: systemd: Local unprivileged user can cause Denial of Service systemd: systemd-machined: Local privilege escalation via varlink systemd: udev in systemd: Privilege escalation via malicious hardware devices and unsanitized kernel output systemd: systemd nspawn: Escape-to-host action via crafted config file systemd: systemd: Denial of Service via malicious IPC API call with null element systemd: systemd-journald: Unintended output to user terminals via logger command

Security update for systemd

Withdrawn by the publisher.

Affected: Ubuntu:Pro:14.04:LTS: systemd, Ubuntu:Pro:16.04:LTS: systemd, Ubuntu:Pro:18.04:LTS: systemd, Ubuntu:Pro:20.04:LTS: systemd, Ubuntu:22.04:LTS: systemd, Ubuntu:24.04:LTS: systemd, Ubuntu:25.10: systemd

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.

Ein Angreifer kann mehrere Schwachstellen in systemd ausnutzen, um seine Privilegien zu erhöhen und um Sicherheitsvorkehrungen zu umgehen.