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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4 March 2024

Several security issues were fixed in Node.js.

  • Ubuntu 23.10 ,
  • 22.04 LTS,
  • 20.04 LTS

4 March 2024

Several security issues were fixed in Thunderbird.

  • Ubuntu 23.10 ,
  • 22.04 LTS,
  • 20.04 LTS

28 February 2024

Several security issues were fixed in the Linux kernel.

  • Ubuntu 23.10 ,
  • 22.04 LTS

28 February 2024

libuv could be made to truncate certain hostnames.

  • Ubuntu 23.10 ,
  • 22.04 LTS,
  • 20.04 LTS

28 February 2024

Several security issues were fixed in Unbound.

  • Ubuntu 23.10 ,
  • 22.04 LTS,
  • 20.04 LTS


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Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.