What is CVE-2026-120749?

CVE-2026-120749 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Reachable Assertion. CVSS score: 6.2/10. Published 2026-11-06.

How severe is CVE-2026-120749?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-120749

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.

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

Frequently asked questions

What is CVE-2026-120749?: CVE-2026-120749 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Reachable Assertion. CVSS score: 6.2/10. Published 2026-11-06.
How severe is CVE-2026-120749?: Medium severity. CVSS v3 base score is 6.2 out of 10.