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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2026-16730

Dbus-broker: dbus-broker: session bus denial of service via emfile during peer setup

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Status
Published
Published
Updated
Assigning organization
redhat

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:36-5.el10_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:28-9.el9_8 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1788880445 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1788880464 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1788880456 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1788765051 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1788880581 to < *unaffected

Red Hat Red Hat Hardened Images

Default version status: affected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: affected

References