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-6658-2: libxml2 vulnerability

11 March 2024

libxml2 could be made to crash or run programs if it opened a specially crafted file.

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

CVE ID

CVE-2024-25062

USN-6684-1: ncurses vulnerability

7 March 2024

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

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

CVE ID

CVE-2023-50495

USN-6647-2: Linux kernel (Azure) vulnerabilities

29 February 2024

Several security issues were fixed in the Linux kernel.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2023-51780, CVE-2023-7192, CVE-2023-51782

USN-6646-1: Linux kernel vulnerabilities

20 February 2024

Several security issues were fixed in the Linux kernel.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2023-51782, CVE-2023-51780, CVE-2023-7192

USN-6645-1: Linux kernel vulnerability

20 February 2024

The system could be made to stop responding under certain conditions.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2023-7192

USN-6644-1: LibTIFF vulnerabilities

19 February 2024

Several security issues were fixed in LibTIFF.

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

CVE ID

CVE-2023-6228, CVE-2023-52356, CVE-2023-6277

USN-6640-1: shadow vulnerability

15 February 2024

shadow could be made to expose sensitive information.

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

CVE ID

CVE-2023-4641

LSN-0100-1: Kernel Live Patch Security Notice

7 February 2024

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-2023-6817, CVE-2023-6040, CVE-2023-6932 + 2 others

USN-6621-1: ImageMagick vulnerability

1 February 2024

ImageMagick could be made to crash if it opened a specially crafted file.

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

CVE ID

CVE-2023-5341

USN-6591-2: Postfix update

31 January 2024

Postfix could allow bypass of email authentication if it received specially crafted network traffic.

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

CVE ID

CVE-2023-51764

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