Home / mailings

PDF

[USN-8089-3] ADSys, Juju Core, LXD vulnerabilities

Posted on 07 April 2026
Ubuntu Security

==========================================================================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

--===============4823260416155621582==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP