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-5761-2: ca-certificates update

6 December 2022

A distrusted certificate authority has been removed from ca-certificates.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

USN-5760-2: libxml2 vulnerabilities

5 December 2022

Several security issues were fixed in libxml2.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2022-40304, CVE-2022-40303

USN-5758-1: Linux kernel vulnerabilities

1 December 2022

Several security issues were fixed in the Linux kernel.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2022-3621, CVE-2022-3239, CVE-2022-3566 + 10 others

USN-5718-2: pixman vulnerability

30 November 2022

pixman could be made to crash or run programs if it processed specially crafted input.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2022-44638

USN-5745-2: shadow regression

29 November 2022

USN-5745-1 introduced a regression in shadow.

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

USN-5747-1: Bind vulnerabilities

29 November 2022

Several security issues were fixed in Bind.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2016-2775, CVE-2016-6170

USN-5745-1: shadow vulnerability

28 November 2022

shadow could be made to overwrite files.

  • Ubuntu 22.10 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2013-4235

USN-5742-1: JBIG-KIT vulnerability

24 November 2022

JBIG-KIT could be made to crash if it opened a specially crafted file.

  • Ubuntu 22.10 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2017-9937

USN-5736-1: ImageMagick vulnerabilities

24 November 2022

Several security issues were fixed in ImageMagick.

  • Ubuntu 22.10 ,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-20313, CVE-2021-20224, CVE-2021-20246 + 14 others

USN-5740-1: X.Org X Server vulnerabilities

23 November 2022

Several security issues were fixed in X.Org X Server.

  • Ubuntu 22.10 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2022-3550, CVE-2022-3551

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