Description
It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [freedesktop.org] | systemd | 242 | — |
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 | 242-4 | — |
| Debian 13 | systemd | 242-4 | — |
| Debian 12 | systemd | 242-4 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | systemd | 237-3ubuntu10.38 | USN-4269-1 |
| Ubuntu 16.04 LTS | systemd | 229-4ubuntu21.27 | USN-4269-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | systemd +7 | 239-29.el8 | RHSA-2020:1794 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | systemd | 234-24.30.1 | SUSE-SU-2019:1364-2 |
| SLES 15 | systemd | 234-24.30.1 | SUSE-SU-2019:1364-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | systemd | 249.4-2.2 | openSUSE-SU-2024:11420-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | systemd +7 | 239-29.0.1.el8 | ELSA-2020-1794 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- systemd - DynamicUser can Create setuid Binaries when Assisted by Another Process EDB-46760 · dos · Apr 26, 2019 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 7
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- USN-4269-1 systemd vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2019:1364-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11420-1 libsystemd0-249.4-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1364-2 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:1794 Red Hat Security Advisory: systemd security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ELSA-2020-1794 Moderate: systemd security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2020
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3844
- 108096 vdb-entry
- https://security.netapp.com/advisory/ntap-20190619-0002/
- USN-4269-1 vendor-advisory
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list