Ubuntu Security Notices USN-8685-1 USN-8685-1: bzip2 vulnerability Publication date 27 August 2026 Overview bzip2 could be made to crash if it processed a specially crafted archive. Releases 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS 16.04 LTS 14.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages bzip2 - high-quality block-sorting file compressor Details It was discovered that bzip2 did not properly manage memory under certain circumstances. An attacker could possibly use this issue to cause a crash, resulting in a denial of service. It was discovered that bzip2 did not properly manage memory under certain circumstances. An attacker could possibly use this issue to cause a crash, resulting in a denial of service. 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 26.04 LTS resolute bzip2 – 1.0.8-6ubuntu0.1 24.04 LTS noble bzip2 – 1.0.8-5.1ubuntu0.1 22.04 LTS jammy bzip2 – 1.0.8-5ubuntu0.1 20.04 LTS focal bzip2 – 1.0.8-2ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro . 18.04 LTS bionic bzip2 – 1.0.6-8.1ubuntu0.2+esm1 Ubuntu Pro Fix available with Ubuntu Pro . 16.04 LTS xenial bzip2 – 1.0.6-8ubuntu0.2+esm1 Ubuntu Pro Fix available with Ubuntu Pro via Legacy Support add-on. 14.04 LTS trusty bzip2 – 1.0.6-5ubuntu0.1~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-2026-42250 CVE-2026-42250