CVE-2026-16730

Impact

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 packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• 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