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-4901-1: Linux kernel (Trusty HWE) vulnerabilities

6 April 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 12.04

CVE ID

CVE-2021-27365, CVE-2021-27363, CVE-2021-27364 + 1 other

USN-4737-2: Bind vulnerability

1 March 2021

Bind could be made to crash or run programs if it received specially crafted network traffic.

  • Ubuntu 14.04 LTS,
  • 12.04

CVE ID

CVE-2020-8625

USN-4745-1: OpenSSL vulnerabilities

23 February 2021

Several security issues were fixed in OpenSSL.

  • Ubuntu 14.04 LTS,
  • 12.04

CVE ID

CVE-2021-23841, CVE-2020-1971

USN-4705-2: Sudo vulnerability

27 January 2021

Several security issues were fixed in Sudo.

  • Ubuntu 14.04 LTS,
  • 12.04

CVE ID

CVE-2021-3156

USN-4692-1: tar vulnerabilities

13 January 2021

Several security issues were fixed in tar.

  • Ubuntu 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS,
  • 12.04

CVE ID

CVE-2018-20482, CVE-2019-9923

USN-4672-1: unzip vulnerabilities

16 December 2020

Several security issues were fixed in unzip.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS,
  • 12.04

CVE ID

CVE-2018-1000035, CVE-2018-18384, CVE-2014-9913 + 2 others

USN-4666-2: lxml vulnerability

11 December 2020

lxml could allow cross-site scripting (XSS) attacks.

  • Ubuntu 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS,
  • 12.04

CVE ID

CVE-2020-27783

USN-4665-2: curl vulnerabilities

9 December 2020

Several security issues were fixed in curl.

  • Ubuntu 14.04 LTS,
  • 12.04

CVE ID

CVE-2020-8285, CVE-2020-8284

USN-4666-1: lxml vulnerability

9 December 2020

lxml could allow cross-site scripting (XSS) attacks.

  • Ubuntu 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS,
  • 12.04

CVE ID

CVE-2020-27783

USN-4645-1: Mutt vulnerability

25 November 2020

Mutt could be made to expose sensitive information.

  • Ubuntu 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 12.04

CVE ID

CVE-2020-28896

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