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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6 September 2013

Several security issues were fixed in the kernel.

  • Ubuntu 12.10

6 September 2013

Several security issues were fixed in the kernel.

  • Ubuntu 12.10

5 September 2013

Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

  • Ubuntu 13.04 ,
  • 12.10 ,
  • 12.04 ,
  • 10.04

CVE ID

CVE-2013-4248


20 August 2013

Several security issues were fixed in the kernel.

  • Ubuntu 12.10

20 August 2013

Several security issues were fixed in the kernel.

  • Ubuntu 12.10

15 August 2013

Several security issues were fixed in Puppet.

  • Ubuntu 13.04 ,
  • 12.10 ,
  • 12.04

14 August 2013

libimobiledevice could be made to overwrite files as the administrator, or access device keys.

  • Ubuntu 13.04 ,
  • 12.10

CVE ID

CVE-2013-2142


7 August 2013

Several security issues were fixed in Thunderbird.

  • Ubuntu 13.04 ,
  • 12.10 ,
  • 12.04

6 August 2013

This update provides compatible packages for Firefox 23.

  • Ubuntu 13.04 ,
  • 12.10 ,
  • 12.04

6 August 2013

Firefox could be made to crash or run programs as your login if it opened a malicious website.

  • Ubuntu 13.04 ,
  • 12.10 ,
  • 12.04


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Expanded Security Maintenance

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