CVE-2026-16730: Red Hat Enterprise Linux 10

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

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

• Red Hat Red Hat Enterprise Linux 10: before 0:36-5.el10_2 (fixed in 0:36-5.el10_2)
• Red Hat Red Hat Enterprise Linux 9: before 0:28-9.el9_8 (fixed in 0:28-9.el9_8)
• Red Hat Red Hat Hardened Images
• Red Hat Red Hat Openshift Container Platform 4
• Red Hat Red Hat Update Infrastructure 5: before 1788880445 (fixed in 1788880445); before 1788880464 (fixed in 1788880464); before 1788880456 (fixed in 1788880456); before 1788765051 (fixed in 1788765051); before 1788880581 (fixed in 1788880581)

Published 2026-07-24. Last modified 2026-09-10.