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-5358-1: Linux kernel vulnerabilities

31 March 2022

Several security issues were fixed in the Linux kernel.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-27666, CVE-2022-1055

USN-5355-1: zlib vulnerability

30 March 2022

zlib could be made to crash or run programs if it received specially crafted input.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2018-25032

USN-5354-1: Twisted vulnerabilities

30 March 2022

Several security issues were fixed in Twisted.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-21712, CVE-2022-21716

USN-5313-2: OpenJDK 11 regression

29 March 2022

USN-5313-1 introduced a regression in OpenJDK 11.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

USN-5351-1: Paramiko vulnerability

28 March 2022

Paramiko would allow unintended access to private key files.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-24302

USN-5348-1: Smarty vulnerabilities

28 March 2022

Several security issues were fixed in Smarty.

  • Ubuntu 21.10 ,
  • 18.04 LTS

CVE ID

CVE-2021-21408, CVE-2021-29454, CVE-2021-26120 + 3 others

USN-5321-3: Firefox regressions

24 March 2022

USN-5321-1 introduced minor regressions in Firefox.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

USN-5347-1: OpenVPN vulnerability

24 March 2022

OpenVPN could allow unintended access to network services.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-0547

USN-5345-1: Thunderbird vulnerabilities

23 March 2022

Several security issues were fixed in Thunderbird.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2022-26386, CVE-2022-0566, CVE-2022-22761 + 10 others

USN-5340-1: CKEditor vulnerabilities

22 March 2022

Several security issues were fixed in CKEditor.

  • Ubuntu 21.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2020-9281, CVE-2021-32808, CVE-2018-9861 + 3 others

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