========================================================================== Ubuntu Security Notice USN-8555-1 July 16, 2026
ubuntu-advantage-tools vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in Ubuntu Advantage Tools. Software Description: - ubuntu-advantage-tools: Management tools for Ubuntu Pro Details: Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. (CVE-2026-9494) Frederick Jerusha discovered that Ubuntu Advantage Tools did not properly validate data received from the contract server when writing APT source files. An attacker could possibly use this issue to inject arbitrary APT configuration and execute arbitrary code. (CVE-2026-11386) Mateusz Gierblinski discovered that Ubuntu Advantage Tools did not properly handle symbolic links when collecting diagnostic logs. A local attacker could possibly use this issue to obtain sensitive information from files owned by the administrator. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-12391) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS ubuntu-advantage-pro 37.2ubuntu0.1 ubuntu-advantage-tools 37.2ubuntu0.1 ubuntu-pro-auto-attach 37.2ubuntu0.1 ubuntu-pro-client 37.2ubuntu0.1 ubuntu-pro-client-l10n 37.2ubuntu0.1 Ubuntu 24.04 LTS ubuntu-advantage-pro 37.2ubuntu~24.04.1 ubuntu-advantage-tools 37.2ubuntu~24.04.1 ubuntu-pro-auto-attach 37.2ubuntu~24.04.1 ubuntu-pro-client 37.2ubuntu~24.04.1 ubuntu-pro-client-l10n 37.2ubuntu~24.04.1 Ubuntu 22.04 LTS ubuntu-advantage-pro 37.2ubuntu~22.04.1 ubuntu-advantage-tools 37.2ubuntu~22.04.1 ubuntu-pro-auto-attach 37.2ubuntu~22.04.1 ubuntu-pro-client 37.2ubuntu~22.04.1 ubuntu-pro-client-l10n 37.2ubuntu~22.04.1 Ubuntu 20.04 LTS ubuntu-advantage-pro 37.1ubuntu0~20.04.1 ubuntu-advantage-tools 37.1ubuntu0~20.04.1 ubuntu-pro-auto-attach 37.1ubuntu0~20.04.1 ubuntu-pro-client 37.1ubuntu0~20.04.1 ubuntu-pro-client-l10n 37.1ubuntu0~20.04.1 Ubuntu 18.04 LTS ubuntu-advantage-pro 37.1ubuntu0~18.04.1 ubuntu-advantage-tools 37.1ubuntu0~18.04.1 ubuntu-pro-auto-attach 37.1ubuntu0~18.04.1 ubuntu-pro-client 37.1ubuntu0~18.04.1 ubuntu-pro-client-l10n 37.1ubuntu0~18.04.1 Ubuntu 16.04 LTS ubuntu-advantage-pro 37.1ubuntu0~16.04.1 ubuntu-advantage-tools 37.1ubuntu0~16.04.1 ubuntu-pro-auto-attach 37.1ubuntu0~16.04.1 ubuntu-pro-client 37.1ubuntu0~16.04.1 ubuntu-pro-client-l10n 37.1ubuntu0~16.04.1 Ubuntu 14.04 LTS ubuntu-advantage-tools 19.7ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8555-1 CVE-2026-11386, CVE-2026-12391, CVE-2026-9494 Package Information: https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/37.2ubuntu0.1 https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/37.2ubuntu~24.04.1 https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/37.2ubuntu~22.04.1 https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/37.1ubuntu0~20.04.1 https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/37.1ubuntu0~18.04.1 https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/37.1ubuntu0~16.04.1 https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools/19.7ubuntu0.1
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