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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3 May 2021

Several security issues were fixed in the kernel.

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

22 April 2021

USN-4916-1 introduced a regression in the Linux kernel.

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

20 April 2021

libcaca could be made to execute arbitrary code if it received a specially crafted image.

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

CVE ID

CVE-2021-3410


20 April 2021

Several security issues were fixed in ClamAV.

  • Ubuntu 14.04 LTS

19 April 2021

OpenSLP could be made to crash or run programs as your login if it received specially crafted network traffic.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2019-5544


15 April 2021

Several security issues were fixed in the Linux kernel.

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

14 April 2021

Underscore could be made to inject arbitrary code if it received a specially crafted input.

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

13 April 2021

Several security issues were fixed in the Linux kernel.

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

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



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