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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26 September 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

26 September 2023

CUPS could be made to expose sensitive information.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

25 September 2023

Open VM Tools could allow unintended access to network services.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

25 September 2023

AccountsService could be made to crash or run programs if it received specially crafted messages.

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

CVE ID

CVE-2023-3297


22 September 2023

FLAC could be made to crash or run programs as your login if it opened a specially crafted file.

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

21 September 2023

Python could be made to execute arbitrary code if it received a specially crafted script.

  • Ubuntu 16.04 LTS

21 September 2023

CUPS could be made to crash or run programs if it opened a specially crafted file.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2023-4504


21 September 2023

ImageMagick could be made to crash when processing the -help option.

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

19 September 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

19 September 2023

Memcached could be made to denial of service.

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


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