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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | systemd | 260~rc3-1 | — |
| Debian 13 | systemd | 257.13-1~deb13u1 | — |
| Debian 12 | systemd | 252.39-1~deb12u2 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | systemd +20 | 260.1-2.1.hum1 | RHSA-2026:7299 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | systemd | 254.27-150600.4.62.1 | SUSE-SU-2026:1040-1 |
| SLES 15 SP6 | systemd | 254.27-150600.4.62.1 | SUSE-SU-2026:1040-1 |
| SLES 15 SP5 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLES 15 SP4 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLES 12 SP5 | systemd | 228-157.75.1 | SUSE-SU-2026:0991-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | systemd | 257.13-160000.1.1 | SUSE-SU-2026:23620-1, SUSE-SU-2026:21144-1 |
| SLES for SAP 15 SP6 | systemd | 254.27-150600.4.62.1 | SUSE-SU-2026:1040-1 |
| SLES for SAP 15 SP5 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLES for SAP 15 SP4 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLES 16.0 | systemd | 257.13-160000.1.1 | SUSE-SU-2026:23620-1, SUSE-SU-2026:21144-1 |
| SLE Micro 6.2 | systemd | 257.13-160000.1.1 | SUSE-SU-2026:23470-1, SUSE-SU-2026:23454-1, SUSE-SU-2026:21003-1 |
| SLE Micro 6.1 | systemd | 254.27-slfo.1.1_4.1 | SUSE-SU-2026:20826-1 |
| SLE Micro 6.0 | systemd | 254.27-3.1 | SUSE-SU-2026:20822-1 |
| SLE Micro 5.5 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLE Micro 5.4 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLE Micro 5.3 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLE Micro 5.2 | systemd | 246.16-150300.7.65.1 | SUSE-SU-2026:0990-1 |
| SLE HPC 15 SP5 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
| SLE HPC 15 SP4 | systemd | 249.17-150400.8.55.1 | SUSE-SU-2026:1061-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | systemd | 259.5-1.3 | openSUSE-SU-2026:10624-1 |
| openSUSE Leap 16.0 | systemd | 257.13-160000.1.1 | openSUSE-SU-2026:21754-1, openSUSE-SU-2026:20471-1 |
| openSUSE Leap 16.0 | systemd-mini | 257.13-160000.4.1 | openSUSE-SU-2026:21754-1 |
| openSUSE Leap 15.6 | systemd | 254.27-150600.4.62.1 | SUSE-SU-2026:1040-1 |
Advisories 17
- RHSA-2026:7299 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SUSE-SU-2026:23620-1 Security update for systemd SUSE / openSUSE Security Updates · Sep 29, 2026
- WID-SEC-2026-0720 systemd: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 16, 2026
- SUSE-SU-2026:23470-1 Security update for systemd SUSE / openSUSE Security Updates · Sep 14, 2026
- SUSE-SU-2026:23454-1 Security update for systemd SUSE / openSUSE Security Updates · Sep 14, 2026
- openSUSE-SU-2026:21754-1 Security update for systemd SUSE / openSUSE Security Updates · Sep 9, 2026
- SUSE-SU-2026:20998-1 Security update for systemd SUSE / openSUSE Security Updates · Jul 9, 2026
- openSUSE-SU-2026:10624-1 libsystemd0-259.5-1.3 on GA media SUSE / openSUSE Security Updates · Apr 27, 2026
- SUSE-SU-2026:21144-1 Security update for systemd SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:21003-1 Security update for systemd SUSE / openSUSE Security Updates · Apr 14, 2026
- openSUSE-SU-2026:20471-1 Security update for systemd SUSE / openSUSE Security Updates · Apr 10, 2026
- SUSE-SU-2026:20826-1 Security update for systemd SUSE / openSUSE Security Updates · Mar 27, 2026
- SUSE-SU-2026:1040-1 Security update for systemd SUSE / openSUSE Security Updates · Mar 27, 2026
- SUSE-SU-2026:1061-1 Security update for systemd SUSE / openSUSE Security Updates · Mar 27, 2026
- SUSE-SU-2026:20822-1 Security update for systemd SUSE / openSUSE Security Updates · Mar 26, 2026
- SUSE-SU-2026:0990-1 Security update for systemd SUSE / openSUSE Security Updates · Mar 25, 2026
- SUSE-SU-2026:0991-1 Security update for systemd SUSE / openSUSE Security Updates · Mar 25, 2026
References
- RHSA-2026:7299 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-4105 vdb-entry
- RHBZ#2447262 issue-tracking
- https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862