Advisoriesby IbisRed HatCVE-2026-16730
Red Hat dbus-broker.: improper exception handling
No fix yet
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Hardened Images Product | all versions | No fix yet |
| Red Hat OpenShift Container Platform 4 Product | all versions | No fix yet |
| Red Hat OpenShift Container Platform 5 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-755
- www.cve.org/CVERecord?id=CVE-2026-16730
- nvd.nist.gov/vuln/detail/CVE-2026-16730
- access.redhat.com/errata/RHSA-2026:61340
- access.redhat.com/errata/RHSA-2026:61355
- access.redhat.com/errata/RHSA-2026:66018
- access.redhat.com/security/cve/CVE-2026-16730
- bugzilla.redhat.com/show_bug.cgi?id=2506348
- github.com/bus1/dbus-broker/issues/435