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Ubuntu Security Notice USN-7871-1
November 16, 2025

ffmpeg vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04

Summary:

FFmpeg could be made to crash if it opened a specially crafted
file.

Software Description:
- ffmpeg: Tools for transcoding, streaming and playing of multimedia files

Details:

It was discovered that FFmpeg incorrectly handled memory allocation in the
ALS audio decoder. If a user was tricked into loading a crafted media file,
a remote attacker could possibly use this issue to make FFmpeg crash,
resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  ffmpeg                          7:7.1.1-1ubuntu4.1
  libavcodec61                    7:7.1.1-1ubuntu4.1
  libavformat61                   7:7.1.1-1ubuntu4.1

Ubuntu 25.04
  ffmpeg                          7:7.1.1-1ubuntu1.3
  libavcodec61                    7:7.1.1-1ubuntu1.3
  libavformat61                   7:7.1.1-1ubuntu1.3

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-7871-1
  CVE-2025-7700

Package Information:
  https://launchpad.net/ubuntu/+source/ffmpeg/7:7.1.1-1ubuntu4.1
  https://launchpad.net/ubuntu/+source/ffmpeg/7:7.1.1-1ubuntu1.3