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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25 July 2023

Several security issues were fixed in Graphite-Web.

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

20 July 2023

wkhtmltopdf could be made to expose sensitive information if it opened a specially crafted file.

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

18 July 2023

Several security issues were fixed in YAJL.

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

18 July 2023

Bind could be made to crash if it received specially crafted network traffic.

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

CVE ID

CVE-2023-2828


13 July 2023

Several security issues were fixed in LibTIFF.

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

12 July 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

7 July 2023

The system could show undesired warning messages in certain conditions.

  • Ubuntu 14.04 LTS

3 July 2023

GNU Screen could be made to crash applications if it received specially crafted input.

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

3 July 2023

OpenLDAP could be made to crash if it received specially crafted input.

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

CVE ID

CVE-2023-2953


22 June 2023

OpenSSL could be made to consume resources and cause long delays if it processed certain input.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2023-2650



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