CVE-2026-16730
Fixed in a distro release EPSS <1%CVSS 5.5
A flaw was found in dbus-broker. When the process file-descriptor limit is reached, EMFILE/ENFILE errors during peer setup (notably SO_PEERPIDFD) are handled as fatal failures, causing the broker to exit. A local attacker who can open many connections to the user session bus can trigger this and deny service to the desktop session. Flatpak applications can reach the host session bus through the dbus proxy.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Update Infrastructure 5, Red Hat Hardened Images, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | dbus-broker | 36-5.el10_2 |
| AlmaLinux 9 | dbus-broker | 28-9.el9_8 |
| Debian 12 | dbus-broker | no fix |
| Debian 13 | dbus-broker | no fix |
| Debian 14 | dbus-broker | no fix |
| Red Hat Enterprise Linux 10.2 | dbus-broker | 0:36-5.el10_2 |
| Red Hat Enterprise Linux 10.2 | dbus-broker-debuginfo | 0:36-5.el10_2 |
| Red Hat Enterprise Linux 10.2 | dbus-broker-debugsource | 0:36-5.el10_2 |
| Red Hat Enterprise Linux 9 | dbus-broker | 0:28-9.el9_8 |
| Red Hat Enterprise Linux 9 | dbus-broker-debuginfo | 0:28-9.el9_8 |
| Red Hat Enterprise Linux 9 | dbus-broker-debugsource | 0:28-9.el9_8 |
| Rocky Linux 10 | dbus-broker | 0:36-5.el10_2 |
| Rocky Linux 9 | dbus-broker | 0:28-9.el9_8 |
| Ubuntu 22.04 LTS | dbus-broker | no fix |
| Ubuntu 24.04 LTS | dbus-broker | no fix |
| Ubuntu 26.04 LTS | dbus-broker | no fix |