CVE-2026-120749 (GCVE-0-2026-120749)

Vulnerability from cvelistv5 – Published: 2026-11-06 06:56 – Updated: 2026-11-06 06:56
VLAI
Title
Dbus: dbus-daemon: dbus-daemon aborts (reply_serial != 0) when a broadcast from the driver cannot be delivered to a monitored bus
Summary
A flaw was found in D-Bus. With a privileged Monitoring client attached (for example dbus-monitor or busctl monitor), an unprivileged local user can cause dbus-daemon to abort if a driver-originated broadcast such as NameOwnerChanged or ActivatableServicesChanged cannot be delivered to a recipient (for example due to a deny rule or an exceeded outgoing message queue). Driver broadcasts still use serial 0; when delivery fails, composing the monitor error reply asserts reply_serial != 0 and aborts the daemon. This is an incomplete fix for CVE-2023-34969, which only assigned serials for driver messages sent to a single recipient. On the well-known system bus this is a denial of service.
Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1129 records in the last 180 days details
References
Impacted products
Date Public
2026-10-27 00:00
Credits
Upstream acknowledges parkma99 as the original reporter.
Show details on NVD website
To clipboard 

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