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Ubuntu 25.10: Critical Denial of Service Vulnerability in FFmpeg USN-7871-1

ubuntu
Calendar Grey November 17, 2025
Dist Ubuntu Esm H88
FFmpeg has a critical crash vulnerability in Ubuntu; update to prevent possible denial of service attacks.
FFmpeg could be made to crash if it opened a specially crafted file.

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.

Topics%20covered

Topics Covered

security advisory denial of service software update Ubuntu important ffmpeg

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

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7871-1

Topics%20covered

Topics Covered

security advisory denial of service software update Ubuntu important ffmpeg

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

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