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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13 April 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

12 April 2021

SpamAssassin could be made to run programs if it opened a specially crafted file.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2020-1946


8 April 2021

lxml could allow cross-site scripting (XSS) attacks.

  • Ubuntu 14.04 LTS

7 April 2021

curl could be made to expose sensitive information over the network.

  • Ubuntu 14.04 LTS

29 March 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

29 March 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

25 March 2021

USN-3685-1 introduced a regression in Ruby.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2017-0903


25 March 2021

Several security issues were fixed in ldb.

  • Ubuntu 14.04 LTS

25 March 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 14.04 LTS

22 March 2021

Several security issues were fixed in Privoxy.

  • Ubuntu 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS


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Expanded Security Maintenance

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