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-6541-1: GNU C Library vulnerabilities

7 December 2023

Several security issues were fixed in GNU C Library.

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

CVE ID

CVE-2023-4806, CVE-2023-4813, CVE-2023-5156

USN-6522-2: FreeRDP vulnerabilities

7 December 2023

Several security issues were fixed in FreeRDP.

  • Ubuntu 18.04 LTS

CVE ID

CVE-2023-39352, CVE-2022-41877, CVE-2023-39356

USN-6540-1: BlueZ vulnerability

7 December 2023

BlueZ could be made to give a physically proximate attacker keyboard and mouse control of a computer.

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

CVE ID

CVE-2023-45866

USN-6539-1: python-cryptography vulnerabilities

6 December 2023

Several security issues were fixed in python-cryptography.

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

CVE ID

CVE-2023-49083, CVE-2023-23931

USN-6538-1: PostgreSQL vulnerabilities

6 December 2023

Several security issues were fixed in PostgreSQL.

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

CVE ID

CVE-2023-5869, CVE-2023-5870, CVE-2023-5868

USN-6537-1: Linux kernel (GCP) vulnerabilities

6 December 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 23.10

CVE ID

CVE-2023-5158, CVE-2023-5178, CVE-2023-4244 + 8 others

USN-6536-1: Linux kernel vulnerabilities

6 December 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 23.10 ,
  • 22.04 LTS

CVE ID

CVE-2023-5158, CVE-2023-5178, CVE-2023-39189 + 3 others

USN-6535-1: curl vulnerabilities

6 December 2023

Several security issues were fixed in curl.

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

CVE ID

CVE-2023-46219, CVE-2023-46218

USN-6463-2: Open VM Tools vulnerabilities

6 December 2023

Several security issues were fixed in Open VM Tools.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2023-34058, CVE-2023-34059

USN-6534-1: Linux kernel vulnerabilities

5 December 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 23.04 ,
  • 22.04 LTS

CVE ID

CVE-2023-5158, CVE-2023-39194, CVE-2023-39193 + 9 others

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