USN-8519-1: Go Cryptography vulnerabilities

Publication date

9 July 2026

Overview

Go Cryptography could be made to crash if it received specially crafted network traffic.


Packages

Details

Jakub Ciolek and Nicola Murino discovered that Go Cryptography incorrectly
handled SSH agent responses. An attacker could use this to cause a denial
of service. (CVE-2025-47913)

Yuichi Watanabe discovered that Go Cryptography incorrectly handled SSH
key exchanges. An attacker could use this to cause a denial of service.
(CVE-2025-22869)

Jakub Ciolek and Nicola Murino discovered that Go Cryptography incorrectly
handled SSH agent responses. An attacker could use this to cause a denial
of service. (CVE-2025-47913)

Yuichi Watanabe discovered that Go Cryptography incorrectly handled SSH
key exchanges. An attacker could use this to cause a denial of service.
(CVE-2025-22869)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
25.10 questing golang-golang-x-crypto-dev –  1:0.25.0-1ubuntu0.1
24.04 LTS noble golang-golang-x-crypto-dev –  1:0.19.0-1ubuntu0.1~esm3  
22.04 LTS jammy golang-golang-x-crypto-dev –  1:0.0~git20211202.5770296-1ubuntu0.1~esm3  
20.04 LTS focal golang-golang-x-crypto-dev –  1:0.0~git20200221.2aa609c-1ubuntu0.1~esm3  
18.04 LTS bionic golang-go.crypto-dev –  1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3  
golang-golang-x-crypto-dev –  1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3  
16.04 LTS xenial golang-go.crypto-dev –  1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3  
golang-golang-x-crypto-dev –  1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3  

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