Home / mailings

PDF

[USN-8883-2] Go vulnerability

Posted on 15 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8883-2
October 15, 2026

golang-1.23 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Go could allow unintended access to network services.

Software Description:
- golang-1.23: Go programming language compiler

Details:

USN-8883-1 fixed a vulnerability in Go versions 1.18, 1.21, and 1.24. This
update provides the corresponding fix for Go version 1.23.

Original advisory details:

It was discovered that the Go x/net/idna package incorrectly handled
certain Punycode-encoded labels that decoded to ASCII-only labels. An
attacker could possibly use this issue to bypass hostname-based access
controls and escalate privileges.

Update instructions:

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

Ubuntu 22.04 LTS
golang-1.23 1.23.1-1~22.04.3
golang-1.23-go 1.23.1-1~22.04.3
golang-1.23-src 1.23.1-1~22.04.3

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

References:
https://ubuntu.com/security/notices/USN-8883-2
https://ubuntu.com/security/notices/USN-8883-1
CVE-2026-39821

Package Information:
https://launchpad.net/ubuntu/+source/golang-1.23/1.23.1-1~22.04.3

--===============3550096061484762861==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP