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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13 September 2021

Several security issues were fixed in the kernel.

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

9 September 2021

Several security issues were fixed in the Linux kernel.

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

8 September 2021

PySAML2 could be made to accept invalid SAML documents.

  • Ubuntu 16.04 LTS

8 September 2021

Several security issues were fixed in GD library.

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

8 September 2021

The system could be made to crash or run programs as an administrator.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-3653


3 September 2021

uWSGI could be made to crash if it received specially crafted input.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

3 September 2021

Several security issues were fixed in Scilab.

  • Ubuntu 16.04 LTS

31 August 2021

NTFS-3G could be made to execute arbitrary code if it received a specially crafted image file.

  • Ubuntu 16.04 LTS,
  • 14.04 LTS

30 August 2021

APR could be made to expose sensitive information if it received a specially crafted input.

  • Ubuntu 21.04 ,
  • 16.04 LTS,
  • 14.04 LTS

30 August 2021

grilo could be made to allow MITM attacks.

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


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