Description
An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).
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 | 240-6 | — |
| Debian 13 | systemd | 240-6 | — |
| Debian 12 | systemd | 240-6 | — |
| Debian 9 | systemd | 232-25+deb9u9 | DSA-4393-1 |
| Debian 8 | systemd | 215-17+deb8u10 | DLA-1684-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | systemd | 237-3ubuntu10.13 | USN-3891-1 |
| Ubuntu 16.04 LTS | systemd | 229-4ubuntu21.16 | USN-3891-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | systemd +7 | 239-13.el8_0.3 | RHSA-2019:0990 |
| RHEL 7 | redhat-release-virtualization-host +1 | 4.2-8.3.el7 | RHSA-2019:0457 |
| RHEL 7 | redhat-virtualization-host +1 | 4.2-20190219.0.el7_6 | RHSA-2019:0457 |
| RHEL 7 | rhvm-appliance | 2:4.2-20190224.0.el7 | RHSA-2019:0461 |
| RHEL 7 | systemd +9 | 219-62.el7_6.5 | RHSA-2019:0368 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.5 EUS | systemd +9 | 219-57.el7_5.6 | RHSA-2019:1322 |
| RHEL 7.4 EUS | systemd +9 | 219-42.el7_4.16 | RHSA-2019:1502 |
| RHEL 7.3 TUS | systemd +9 | 219-30.el7_3.14 | RHSA-2019:2805 |
| RHEL 7.3 E4S | systemd +9 | 219-30.el7_3.14 | RHSA-2019:2805 |
| RHEL 7.3 AUS | systemd +9 | 219-30.el7_3.14 | RHSA-2019:2805 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | systemd | 234-24.30.1 | SUSE-SU-2019:1364-2 |
| SLES 15 | systemd | 234-24.25.1 | SUSE-SU-2019:1364-1, SUSE-SU-2019:0426-1 |
| SLES 12 SP4 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
| SLES 12 SP3 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
| SLES 12 SP2 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | systemd | 210-116.22.1 | SUSE-SU-2019:0425-1 |
| SLES 12 | systemd | 210-70.77.1 | SUSE-SU-2019:0424-1 |
| SLES for SAP 12 SP4 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
| SLES for SAP 12 SP3 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
| SLES for SAP 12 SP2 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
| SLES for SAP 12 SP1 | systemd | 210-116.22.1 | SUSE-SU-2019:0425-2 |
| SUSE OpenStack Cloud 7 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
| SUSE Enterprise Storage 4 | systemd | 228-150.63.1 | SUSE-SU-2019:1265-1, SUSE-SU-2019:0428-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | systemd | 249.4-2.2 | openSUSE-SU-2024:11420-1 |
| openSUSE Leap 15.0 | systemd +1 | 234-lp150.20.15.1 | openSUSE-SU-2019:0255-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | systemd +9 | 219-57.amzn2.0.9 | ALAS2-2019-1164 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | systemd +7 | 239-13.0.1.el8_0.3 | ELSA-2019-0990 |
| Oracle Linux 7 | systemd +9 | 219-62.0.4.el7_6.5 | ELSA-2019-0368 |
Advisories 24
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2019:2805 Red Hat Security Advisory: systemd security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:1502 Red Hat Security Advisory: systemd security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:1322 Red Hat Security Advisory: systemd security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:0990 Red Hat Security Advisory: systemd security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:0461 Red Hat Security Advisory: rhvm-appliance security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:0457 Red Hat Security Advisory: redhat-virtualization-host security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2019:0368 Red Hat Security Advisory: systemd security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3891-1 systemd vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4393-1 systemd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1684-1 systemd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:0424-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:0255-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0426-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1364-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0428-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1265-1 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-2019:0425-2 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1364-2 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0425-1 Security update for systemd SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-0990 Moderate: systemd security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 30, 2019
- ELSA-2019-0368 Important: systemd security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 19, 2019
- ALAS2-2019-1164 Important: systemd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 18, 2019
References
- FEDORA-2019-8434288a24 vendor-advisory
- [oss-security] 20190218 CVE-2019-6454: systemd (PID1) crash with specially crafted D-Bus message mailing-list
- 107081 vdb-entry
- USN-3891-1 vendor-advisory
- RHSA-2019:0368 vendor-advisory
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c
- SUSE-SA:2019:0255-1 vendor-advisory
- [oss-security] 20190219 CVE-2019-6454: systemd (PID1) crash with specially crafted D-Bus message mailing-list
- [SECURITY] [DLA 1684-1] 20190219 systemd security update mailing-list
- DSA-4393-1 vendor-advisory
- https://security.netapp.com/advisory/ntap-20190327-0004/
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278
- RHSA-2019:0990 vendor-advisory
- openSUSE-SU-2019:1450 vendor-advisory
- RHSA-2019:1322 vendor-advisory
- RHSA-2019:1502 vendor-advisory
- RHSA-2019:2805 vendor-advisory
- [oss-security] 20210720 CVE-2021-33910: Denial of service (stack exhaustion) in systemd (PID 1) mailing-list