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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USN-6496-1: Linux kernel vulnerabilities

21 November 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 22.04 LTS,
  • 20.04 LTS

CVE ID

CVE-2023-25775, CVE-2023-45871, CVE-2023-31085

USN-6493-1: hibagent update

21 November 2023

A security improvement was added to hibagent.

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS

USN-6491-1: Node.js vulnerabilities

21 November 2023

Several security issues were fixed in Node.js.

  • Ubuntu 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-32213, CVE-2022-32214, CVE-2022-32212 + 3 others

USN-6489-1: Tang vulnerability

20 November 2023

Tang could allow unintended access to secret keys.

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

CVE ID

CVE-2023-1672

USN-6490-1: WebKitGTK vulnerabilities

20 November 2023

Several security issues were fixed in WebKitGTK.

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS

CVE ID

CVE-2023-41983, CVE-2023-42852

USN-6488-1: strongSwan vulnerability

20 November 2023

strongSwan could be made to crash or run programs if it received specially crafted network traffic.

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS

CVE ID

CVE-2023-41913

USN-6487-1: Avahi vulnerabilities

20 November 2023

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

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2023-38469, CVE-2023-38471, CVE-2023-38472 + 2 others

USN-6486-1: iniParser vulnerability

20 November 2023

Iniparser could be made to crash if it received a specially crafted file.

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS

CVE ID

CVE-2023-33461

USN-6485-1: Intel Microcode vulnerability

17 November 2023

The system could be made to crash or expose sensitive information under certain conditions.

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2023-23583

USN-6480-1: .NET vulnerabilities

15 November 2023

Several security issues were fixed in .NET.

  • Ubuntu 23.10 ,
  • 23.04 ,
  • 22.04 LTS

CVE ID

CVE-2023-36049, CVE-2023-36558

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