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Echo: dbus: security update to 1.16.2-2+e1

medium Tenable Cloud Security Plugin ID 478668

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-120749)

Solution

Update the dbus library and its related packages to version 1.16.2-2+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-120749

Plugin Details

Severity: Medium

ID: 478668

Version: Revision 1.1

Type: Local

Published: 11/9/2026

Updated: 11/9/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.87

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-120749

CVSS v3

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 5.4

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/8/2026

Vulnerability Publication Date: 11/6/2026

Reference Information

CVE: CVE-2026-120749