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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19 September 2023

Several security issues were fixed in Node.js.

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

18 September 2023

Several security issues were fixed in GNU binutils.

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

14 September 2023

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

  • Ubuntu 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

14 September 2023

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

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

CVE ID

CVE-2023-4156


14 September 2023

DBus could be made to crash if it received a specially crafted request.

  • Ubuntu 16.04 LTS

14 September 2023

libssh2 could be made to crash if it received specially crafted network traffic.

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

14 September 2023

Several security issues were fixed in ModSecurity.

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

13 September 2023

PostgreSQL could be made to execute commands as the bootstrap superuser.

  • Ubuntu 16.04 LTS

13 September 2023

Several security issues were fixed in Ghostscript.

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

12 September 2023

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

  • Ubuntu 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS


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