USN-8746-1: libEBML vulnerability

Publication date

10 September 2026

Overview

libEBML could be made to crash if it received specially crafted input.


Packages

  • libebml - library for the EBML format

Details

It was discovered that libEBML incorrectly handled certain read and write
operations. An attacker could possibly use this issue to cause a buffer
overflow, resulting in a denial of service.

It was discovered that libEBML incorrectly handled certain read and write
operations. An attacker could possibly use this issue to cause a buffer
overflow, 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
22.04 LTS jammy libebml5 –  1.4.2-2ubuntu0.1~esm1  
20.04 LTS focal libebml4v5 –  1.3.10-1ubuntu0.1~esm1  
18.04 LTS bionic libebml4v5 –  1.3.5-2ubuntu0.1+esm1  
16.04 LTS xenial libebml4v5 –  1.3.3-1ubuntu0.1+esm1

Reduce your security exposure

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