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[USN-8806-1] NetworkManager vulnerability

Posted on 23 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8806-1
September 23, 2026

network-manager vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS

Summary:

Fraudulent security certificates could allow sensitive information to be
exposed when connecting to a WPA-Enterprise network.

Software Description:
- network-manager: Network connection manager

Details:

It was discovered that NetworkManager did not properly restrict the
ca-path and phase2-ca-path certificate authority settings for private
(single-user) 802.1X network connections. An attacker could use this issue
to point their own private 802.1X connection profile at a directory under
their control, causing NetworkManager to trust an attacker-chosen
certificate authority and potentially exposing network credentials via a
rogue authentication server.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
network-manager 1.54.3-2ubuntu3.1

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8806-1
CVE-2026-19685

Package Information:
https://launchpad.net/ubuntu/+source/network-manager/1.54.3-2ubuntu3.1

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