CVE-2026-4105
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-4105
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-4105.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 252.39-1~deb12u2 |
| debian | bullseye | fixed | 247.3-7+deb11u8 |
| debian | forky | fixed | 260~rc3-1 |
| debian | sid | fixed | 260~rc3-1 |
| debian | trixie | fixed | 257.13-1~deb13u1 |
References
- https://access.redhat.com/errata/RHSA-2026:7299
- https://access.redhat.com/security/cve/CVE-2026-4105
- https://bugzilla.redhat.com/show_bug.cgi?id=2447262
- https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862
- https://www.suse.com/security/cve/CVE-2026-4105.html
- https://security-tracker.debian.org/tracker/CVE-2026-4105
CWEs
CWE-284
Verify integrity in audit chain (admin only). AS-IS.