USN-8685-1: bzip2 vulnerability

Publication date

27 August 2026

Overview

bzip2 could be made to crash if it processed a specially crafted archive.


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  
18.04 LTS bionic bzip2 –  1.0.6-8.1ubuntu0.2+esm1  
16.04 LTS xenial bzip2 –  1.0.6-8ubuntu0.2+esm1  
14.04 LTS trusty bzip2 –  1.0.6-5ubuntu0.1~esm3  

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.


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