Description
An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.
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 | dbus | 1.12.18-1 | — |
| Debian 13 | dbus | 1.12.18-1 | — |
| Debian 12 | dbus | 1.12.18-1 | — |
| Debian 8 | dbus | 1.8.22-0+deb8u3 | DLA-2235-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | dbus | 1.12.16-2ubuntu2.1 | USN-4398-1 |
| Ubuntu 18.04 LTS | dbus | 1.12.2-1ubuntu1.2 | USN-4398-1 |
| Ubuntu 16.04 LTS | dbus | 1.10.6-1ubuntu3.6 | USN-4398-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | dbus | 1.6.18-0ubuntu4.5+esm2 | USN-4398-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | dbus +6 | 1:1.12.8-10.el8_2 | RHSA-2020:3014 |
| RHEL 7 | dbus +5 | 1:1.10.24-14.el7_8 | RHSA-2020:2894 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.1 EUS | dbus +6 | 1:1.12.8-10.el8_1 | RHSA-2020:3298 |
| RHEL 8.0 E4S | dbus +6 | 1:1.12.8-8.el8_0 | RHSA-2020:3044 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | dbus-1 | 1.12.2-8.11.2 | SUSE-SU-2021:2810-1 |
| SLES 15 SP3 | dbus-1-x11 | 1.12.2-8.11.1 | SUSE-SU-2021:2810-1 |
| SLES 15 SP2 | dbus-1 | 1.12.2-8.11.2 | SUSE-SU-2021:2810-1 |
| SLES 15 SP2 | dbus-1-x11 | 1.12.2-8.11.1 | SUSE-SU-2021:2810-1 |
| SLES 15 | dbus-1 +1 | 1.12.2-3.16.1 | SUSE-SU-2021:2470-1 |
| SLES 12 SP5 | dbus-1 +1 | 1.8.22-35.2 | SUSE-SU-2021:2424-1 |
| SLES 12 SP4 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SLES for SAP 15 | dbus-1 +1 | 1.12.2-3.16.1 | SUSE-SU-2021:2470-1 |
| SLES for SAP 12 SP5 | dbus-1 +1 | 1.8.22-35.2 | SUSE-SU-2021:2424-1 |
| SLES for SAP 12 SP4 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SLES for SAP 12 SP3 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SLE Micro 5.0 | dbus-1 | 1.12.2-8.11.2 | SUSE-SU-2021:2810-1 |
| SLE HPC 15 | dbus-1 +1 | 1.12.2-3.16.1 | SUSE-SU-2021:2470-1 |
| SUSE OpenStack Cloud Crowbar 9 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SUSE OpenStack Cloud Crowbar 8 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SUSE OpenStack Cloud 9 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SUSE OpenStack Cloud 8 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
| SUSE HPE Helion OpenStack 8 | dbus-1 +1 | 1.8.22-29.21.1 | SUSE-SU-2021:2590-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dbus-1 | 1.12.20-5.5 | openSUSE-SU-2024:10711-1 |
| openSUSE Leap 15.3 | dbus-1 | 1.12.2-8.11.2 | openSUSE-SU-2021:2810-1 |
| openSUSE Leap 15.3 | dbus-1-x11 | 1.12.2-8.11.1 | openSUSE-SU-2021:2810-1 |
| openSUSE Leap 15.2 | dbus-1 +1 | 1.12.2-lp152.6.6.1 | openSUSE-SU-2021:1204-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dbus | 1.12.18-r0 | — |
| Alpine v3.23 | dbus | 1.12.18-r0 | — |
| Alpine v3.22 | dbus | 1.12.18-r0 | — |
| Alpine v3.21 | dbus | 1.12.18-r0 | — |
| Alpine v3.20 | dbus | 1.12.18-r0 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | dbus | 1.12.18-r0 | — |
| Alpine v3.18 | dbus | 1.12.18-r0 | — |
| Alpine v3.17 | dbus | 1.12.18-r0 | — |
| Alpine v3.16 | dbus | 1.12.18-r0 | — |
| Alpine v3.15 | dbus | 1.12.18-r0 | — |
| Alpine v3.14 | dbus | 1.12.18-r0 | — |
| Alpine v3.13 | dbus | 1.12.18-r0 | — |
| Alpine v3.12 | dbus | 1.12.18-r0 | — |
| Alpine v3.11 | dbus | 1.12.16-r3 | — |
| Alpine v3.10 | dbus | 1.12.16-r1 | — |
| Alpine v3.9 | dbus | 1.12.28-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | dbus +5 | 1:1.10.24-7.amzn2.0.2 | ALAS2-2022-1870 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | dbus +6 | 1:1.12.8-10.0.1.el8_2 | ELSA-2020-3014 |
| Oracle Linux 7 | dbus +5 | 1:1.10.24-14.0.1.el7_8 | ELSA-2020-2894 |
Advisories 19
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2020:3014 Red Hat Security Advisory: dbus security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:3044 Red Hat Security Advisory: dbus security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:3298 Red Hat Security Advisory: dbus security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:2894 Red Hat Security Advisory: dbus security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4398-2 dbus vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4398-1 dbus vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2235-1 dbus - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:2424-1 Security update for dbus-1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2590-1 Security update for dbus-1 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10711-1 dbus-1-1.12.20-5.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2810-1 Security update for dbus-1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2470-1 Security update for dbus-1 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1204-1 Security update for dbus-1 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2810-1 Security update for dbus-1 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-2006 dbus: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jun 29, 2025
- ALAS2-2022-1870 Important: dbus security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 8, 2022
- ELSA-2020-3014 Important: dbus security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 23, 2020
- ELSA-2020-2894 Important: dbus security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 14, 2020
References
- https://gitlab.freedesktop.org/dbus/dbus/-/issues/294
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16
- http://www.openwall.com/lists/oss-security/2020/06/04/3
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30
- USN-4398-1 vendor-advisory
- USN-4398-2 vendor-advisory
- GLSA-202007-46 vendor-advisory
- https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak
- http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html