Ubuntu Security Notices USN-8091-1 USN-8091-1: util-linux vulnerability Publication date 12 March 2026 Overview util-linux could be made to run programs as an administrator. Releases 25.10 24.04 LTS 22.04 LTS 20.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages util-linux - miscellaneous system utilities Details It was discovered that the util-linux su utility did not drop capabilities when being used with the --pty option. While not a security issue by itself, a local attacker could possibly use the su tool to exploit vulnerabilities in other applications. It was discovered that the util-linux su utility did not drop capabilities when being used with the --pty option. While not a security issue by itself, a local attacker could possibly use the su tool to exploit vulnerabilities in other applications. 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 util-linux – 2.41-4ubuntu4.2 24.04 LTS noble util-linux – 2.39.3-9ubuntu6.5 22.04 LTS jammy util-linux – 2.37.2-4ubuntu3.5 20.04 LTS focal util-linux – 2.34-0.1ubuntu9.6+esm1 Ubuntu Pro Fix available with Ubuntu Pro . 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 https://launchpad.net/bugs/2143850