Ubuntu alert USN-8089-3 (adsys, juju-core, lxd)

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noreply+usn-bot@canonical.com
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ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8089-3] ADSys, Juju Core, LXD vulnerabilities
Date:
             
 
Tue, 07 Apr 2026 21:16:49 +0000
Message-ID:
             
 
<E1wADmz-00064A-8W@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8089-3
April 07, 2026

adsys, juju-core, lxd vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in ADSys, Juju Core, LXD

Software Description:
- adsys: Active Directory Group Policy client
- lxd: Container hypervisor based on LXC
- juju-core: Application orchestration engine

Details:

USN-8089-1 fixed vulnerabilities in Go Networking. This update provides
the corresponding update to code vendored in LXD, ADSys, and Juju Core.

Original advisory details:

 Bahruz Jabiyev, Tommaso Innocenti, Anthony Gavazzi, Steven Sprecher, and
 Kaan Onarlioglu discovered that servers using Go Networking could hang
 during shutdown if preempted by a fatal error. An attacker could possibly
 use this to cause a denial of service. This issue only affected Ubuntu
 22.04 LTS. (CVE-2022-27664)

 Arpad Ryszka and Jakob Ackermann discovered that a maliciously crafted
 stream could cause excessive CPU usage in Go Networking's HPACK decoder. An
 attacker could possibly use this to cause a denial of service. This issue
 only affected Ubuntu 22.04 LTS. (CVE-2022-41723)

 Mohammad Thoriq Aziz discovered that Go Networking did not properly
 sanitize some text nodes. An attacker could possibly use this to execute
 arbitrary code. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-3978)

 Sean Ng discovered an error in Go Networking's HTML tag handling. An
 attacker could possibly use this to cause a denial of service.
 (CVE-2025-22872)

 Guido Vranken and Jakub Ciolek discovered that a maliciously crafted HTML
 document could exhaust system resources on servers using Go Networking. An
 attacker could possibly use this to cause a denial of service.
 (CVE-2025-47911)

 Guido Vranken discovered that a maliciously crafted HTML document could put
 servers using Go Networking into an infinite loop. An attacker could
 possibly use this to cause a denial of service. (CVE-2025-58190)

Update instructions:

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

Ubuntu 20.04 LTS
  adsys                           0.9.2~20.04.2ubuntu0.1+esm1
                                  Available with Ubuntu Pro
  adsys-windows                   0.9.2~20.04.2ubuntu0.1+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  lxd                             3.0.3-0ubuntu1~18.04.2+esm2
                                  Available with Ubuntu Pro
  lxd-client                      3.0.3-0ubuntu1~18.04.2+esm2
                                  Available with Ubuntu Pro
  lxd-tools                       3.0.3-0ubuntu1~18.04.2+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  golang-github-lxc-lxd-dev       2.0.11-0ubuntu1~16.04.4+esm2
                                  Available with Ubuntu Pro
  juju                            2.3.7-0ubuntu0.16.04.1+esm2
                                  Available with Ubuntu Pro
  juju-2.0                        2.3.7-0ubuntu0.16.04.1+esm2
                                  Available with Ubuntu Pro
  lxc2                            2.0.11-0ubuntu1~16.04.4+esm2
                                  Available with Ubuntu Pro
  lxd                             2.0.11-0ubuntu1~16.04.4+esm2
                                  Available with Ubuntu Pro
  lxd-client                      2.0.11-0ubuntu1~16.04.4+esm2
                                  Available with Ubuntu Pro
  lxd-tools                       2.0.11-0ubuntu1~16.04.4+esm2
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8089-3
  https://ubuntu.com/security/notices/USN-8089-2
  https://ubuntu.com/security/notices/USN-8089-1
  CVE-2021-33194, CVE-2022-27664, CVE-2022-41723, CVE-2023-3978,
  CVE-2025-22872, CVE-2025-47911, CVE-2025-58190


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