Ubuntu Security Notices

Developers issue an Ubuntu Security Notice when a security issue is fixed in an official Ubuntu package. You can find additional guidance for high-profile vulnerabilities in the Ubuntu Vulnerability Knowledge Base section.

To report a security vulnerability in an Ubuntu package, please contact the Security Team.

The Security Team also produces OVAL files for each Ubuntu release. These are an industry-standard machine-readable format dataset that contain details of all known security vulnerabilities and fixes relevant to the Ubuntu release, and can be used to determine whether a particular patch is appropriate. OVAL files can also be used to audit a system to check whether the latest security fixes have been applied.

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16 October 2025

Several security issues were fixed in .NET

  • Ubuntu 25.10 ,
  • 25.04 ,
  • 24.04 LTS,
  • 22.04 LTS

16 October 2025

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

  • Ubuntu 24.04 LTS,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS

16 October 2025

Several security issues were fixed in Samba.

  • Ubuntu 25.10 ,
  • 25.04 ,
  • 24.04 LTS,
  • 22.04 LTS

16 October 2025

Redis could be made to crash or run programs if it received specially crafted network traffic from an authenticated user.

  • Ubuntu 22.04 LTS

16 October 2025

Redict could be made to crash or run programs if it received specially crafted network traffic from an authenticated user.

  • Ubuntu 25.10 ,
  • 25.04

16 October 2025

Several security issues were fixed in MuPDF.

  • Ubuntu 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

15 October 2025

Redis could be made to crash or run programs if it received specially crafted network traffic from an authenticated user.

  • Ubuntu 25.10 ,
  • 25.04 ,
  • 24.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

15 October 2025

Several security issues were fixed in the Linux kernel.

  • Ubuntu 22.04 LTS

15 October 2025

Several security issues were fixed in FFmpeg.

  • Ubuntu 24.04 LTS,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

14 October 2025

Several security issues were fixed in the Linux kernel.

  • Ubuntu 22.04 LTS

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