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Vulnerabilities CVE-2026-16730

CVE-2026-16730

Medium
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
5.5
EPSS Score
0.11%

1.3th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Jul 24, 2026
Last Modified
Aug 5, 2026
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