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-6337-1: Linux kernel (Azure) vulnerabilities

4 September 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS

CVE ID

CVE-2022-27672, CVE-2023-2124, CVE-2022-0168 + 13 others

USN-6336-1: Docker Registry vulnerabilities

4 September 2023

docker-registry 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

CVE ID

CVE-2023-2253, CVE-2017-11468

USN-6335-1: BusyBox vulnerabilities

4 September 2023

Several security issues were fixed in BusyBox.

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

CVE ID

CVE-2022-48174, CVE-2021-28831

USN-6334-1: atftp vulnerabilities

4 September 2023

Several security issues were fixed in atftp.

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

CVE ID

CVE-2020-6097, CVE-2021-46671, CVE-2021-41054

USN-6329-1: Linux kernel vulnerabilities

31 August 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS

CVE ID

CVE-2023-3609, CVE-2023-3611, CVE-2023-20593 + 2 others

USN-6326-1: GitPython vulnerability

31 August 2023

GitPython could be made to run arbitrary commands on the host.

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

CVE ID

CVE-2023-40267

USN-6322-1: elfutils vulnerabilities

30 August 2023

Several security issues were fixed in elfutils.

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

CVE ID

CVE-2021-33294, CVE-2020-21047, CVE-2018-18521 + 7 others

USN-6263-2: OpenJDK regression

30 August 2023

USN-6263-1 introduced a regression in OpenJDK 11 and OpenJDK 17.

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

USN-6319-1: AMD Microcode vulnerability

30 August 2023

AMD processors may allow an attacker to expose sensitive information due to a speculative execution vulnerability.

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

CVE ID

CVE-2023-20569

USN-6317-1: Linux kernel vulnerabilities

29 August 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-40982, CVE-2023-3609, CVE-2023-3776 + 2 others

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