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-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-4668-4: python-apt vulnerability

11 January 2021

python-apt could be made to crash if it opened a specially crafted file.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2020-27351

USN-4667-2: APT vulnerability

11 January 2021

APT could be made to crash or stop responding if it opened a specially crafted file.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2020-27350

USN-4677-2: p11-kit vulnerability

6 January 2021

Several security issues were fixed in p11-kit.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2020-29361

USN-4680-1: Linux kernel vulnerabilities

6 January 2021

Several security issues were fixed in the Linux kernel.

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

CVE ID

CVE-2020-0423, CVE-2020-28974, CVE-2020-25656 + 6 others

USN-4681-1: Linux kernel vulnerabilities

6 January 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2020-25668, CVE-2020-4788, CVE-2019-0148 + 3 others

USN-4674-2: Dovecot vulnerability

4 January 2021

Dovecot could be made to denial of service if it received a specially crafted MIME.

  • Ubuntu 14.04 LTS

CVE ID

CVE-2020-25275

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

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