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-5114-1: Linux kernel vulnerabilities

22 October 2021

Several security issues were fixed in the Linux kernel.

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

CVE ID

CVE-2020-3702, CVE-2021-40490, CVE-2021-38198 + 1 other

USN-5119-1: libcaca vulnerabilities

21 October 2021

libcaca could be made to crash if it received a specially crafted image.

  • Ubuntu 21.10 ,
  • 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-30498, CVE-2021-30499

USN-5111-2: strongSwan vulnerability

19 October 2021

Several security issues were fixed in strongSwan.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-41991

USN-5109-1: nginx vulnerability

18 October 2021

A security issue was fixed in nginx.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2017-20005

USN-5094-1: Linux kernel vulnerabilities

29 September 2021

Several security issues were fixed in the Linux kernel.

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

CVE ID

CVE-2021-3732, CVE-2021-3679, CVE-2021-37576 + 3 others

USN-5093-1: Vim vulnerabilities

28 September 2021

Several security issues were fixed in Vim.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-3796, CVE-2021-3778, CVE-2021-3770

USN-5090-2: Apache HTTP Server vulnerabilities

27 September 2021

Several security issues were fixed in Apache HTTP Server.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-39275, CVE-2021-40438, CVE-2021-34798

USN-5089-2: ca-certificates update

23 September 2021

A certificate about to expire was removed from ca-certificates.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

USN-5079-4: curl regression

21 September 2021

USN-5079-2 introduced a regression in curl.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

USN-5083-1: Python vulnerabilities

16 September 2021

Several security issues were fixed in Python.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-3733, CVE-2021-3737

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