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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LSN-0099-1: Kernel Live Patch Security Notice

28 November 2023

Several security issues were fixed in the kernel.

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

CVE ID

CVE-2023-42752, CVE-2023-3777, CVE-2023-3609 + 13 others

USN-6513-1: Python vulnerabilities

23 November 2023

Several security issues were fixed in Python.

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

CVE ID

CVE-2023-40217, CVE-2022-48564

USN-6512-1: LibTIFF vulnerabilities

23 November 2023

Several security issues were fixed in LibTIFF.

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

CVE ID

CVE-2023-3576, CVE-2022-40090

USN-6510-1: Apache HTTP Server vulnerability

23 November 2023

Apache HTTP Server could be made to crash if it received a specially crafted request.

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

CVE ID

CVE-2023-31122

USN-6508-1: poppler vulnerabilities

23 November 2023

Several security issues were fixed in poppler.

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

CVE ID

CVE-2022-37051, CVE-2020-23804, CVE-2022-38349 + 2 others

USN-6494-1: Linux kernel vulnerabilities

21 November 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2023-5717, CVE-2023-39194, CVE-2023-39193 + 6 others

USN-6493-2: hibagent update

21 November 2023

A security improvement was added to hibagent.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

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-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-6473-2: pip vulnerabilities

15 November 2023

Several security issues were fixed in pip.

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

CVE ID

CVE-2023-45803, CVE-2018-25091, CVE-2023-43804

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