Ubuntu Security Notices USN-8519-1 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. Releases 25.10 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS 16.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages golang-go.crypto - Supplementary Go cryptography libraries 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 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 22.04 LTS jammy golang-golang-x-crypto-dev – 1:0.0~git20211202.5770296-1ubuntu0.1~esm3 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 20.04 LTS focal golang-golang-x-crypto-dev – 1:0.0~git20200221.2aa609c-1ubuntu0.1~esm3 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 18.04 LTS bionic golang-go.crypto-dev – 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. golang-golang-x-crypto-dev – 1:0.0~git20170629.0.5ef0053-2ubuntu0.1~esm3 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 16.04 LTS xenial golang-go.crypto-dev – 1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3 Ubuntu Pro Fix available with Ubuntu Pro via Legacy Support add-on. golang-golang-x-crypto-dev – 1:0.0~git20151201.0.7b85b09-2ubuntu0.1~esm3 Ubuntu Pro Fix available with Ubuntu Pro via Legacy Support add-on. Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Get Ubuntu Pro References CVE-2025-47913 CVE-2025-22869 CVE-2025-47913 CVE-2025-22869