PT-2026-64278 · Red Hat · Red Hat Enterprise Linux 10+3

CVE-2026-16730 · Published 2026-07-24 · Updated 2026-07-24

Mitre

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Improper Handling of Exceptional Conditions

Weakness Enumeration

CWE-755

Related Identifiers

CVE-2026-16730

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 9

Red Hat Hardened Images

Red Hat Openshift Container Platform 4

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-16730 · Security Note
• https://github.com/bus1/dbus-broker/issues/435 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2506348 · Note
• https://access.redhat.com/security/cve/CVE-2026-16730 · Note