CVE-2026-16730 | A flaw was found in dbus-broker. When the process file-descr… | CVSS 5.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-16730
State: PUBLISHED
Assigner: redhat
Reserved: 2026-07-23 05:56 UTC
Published: 2026-07-24 11:26 UTC
Last updated: 2026-07-24 14:48 UTC
Primary CWE: CWE-755
Improper Handling of Exceptional Conditions
Vendor / Product: Red Hat / Red Hat Enterprise Linux 10
Sources: cve.org · NVD

Severity & Metrics

5.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (4)

Vendor	Product	Platform	Versions
Red Hat	Red Hat Enterprise Linux 10	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—
Red Hat	Red Hat Hardened Images	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—

Weakness (CWE)

CWE	Source	Description
CWE-755	cna	Improper Handling of Exceptional Conditions

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.5	MEDIUM	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (3)