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-4965-1: Apport vulnerabilities

25 May 2021

Several security issues were fixed in Apport.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-32549, CVE-2021-32554, CVE-2021-32547 + 8 others

USN-4964-1: Exiv2 vulnerabilities

25 May 2021

Several security issues were fixed in Exiv2.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2021-29464, CVE-2021-29463, CVE-2021-32617 + 2 others

USN-4962-1: Babel vulnerability

19 May 2021

Babel code be made to execute arbitrary code if it received a specially crafted input.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-20095

USN-4963-1: Pillow vulnerabilities

19 May 2021

Pillow could be made to crash or hang if it opened a specially crafted file.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-28677, CVE-2021-28675, CVE-2021-28678 + 3 others

USN-4960-1: runC vulnerability

19 May 2021

runC could be made to overwrite files as the administrator.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-30465

USN-4959-1: GStreamer Base Plugins vulnerability

18 May 2021

GStreamer Base Plugins could be made to expose sensitive information if it received a specially crafted input.

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

CVE ID

CVE-2021-3522

USN-4958-1: Caribou vulnerability

17 May 2021

Applications using Caribou could be made to crash if given specially crafted input.

  • Ubuntu 20.10 ,
  • 20.04 LTS

USN-4957-1: DjVuLibre vulnerabilities

17 May 2021

Several security issues were fixed in DjVuLibre.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-32493, CVE-2021-32490, CVE-2021-3500 + 2 others

USN-4956-1: Eventlet vulnerability

17 May 2021

Eventlet could be made denial of service if it received a specially crafted request.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS

CVE ID

CVE-2021-21419

USN-4628-3: Intel Microcode vulnerabilities

17 May 2021

Several security issues were fixed in Intel Microcode.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2020-8698, CVE-2020-8696, CVE-2020-8695

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