Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unaffected 0:36-5.el10_2 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:28-9.el9_8 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1788880445 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1788880464 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1788880456 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1788765051 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1788880581 before * |
| Red Hat / Red Hat Hardened Images | affected |
| Red Hat / Red Hat OpenShift Container Platform 4 | affected |
CWE
CWE-755
References
- https://access.redhat.com/errata/RHSA-2026:61340
- https://access.redhat.com/errata/RHSA-2026:61355
- https://access.redhat.com/errata/RHSA-2026:66018
- https://access.redhat.com/security/cve/CVE-2026-16730
- https://bugzilla.redhat.com/show_bug.cgi?id=2506348
- https://github.com/bus1/dbus-broker/issues/435
ADP enrichment
No English description supplied.
No references supplied.