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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131 - 140 of 178 results

USN-4994-1: Apache HTTP Server vulnerabilities

21 June 2021

Several security issues were fixed in Apache HTTP Server.

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

CVE ID

CVE-2021-26691, CVE-2021-26690, CVE-2020-35452 + 2 others

USN-4993-1: Dovecot vulnerabilities

21 June 2021

Several security issues were fixed in Dovecot.

  • Ubuntu 21.04 ,
  • 20.10 ,
  • 20.04 LTS

CVE ID

CVE-2021-29157, CVE-2021-33515

USN-4991-1: libxml2 vulnerabilities

17 June 2021

Several security issues were fixed in libxml2.

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

CVE ID

CVE-2021-3516, CVE-2017-8872, CVE-2020-24977 + 5 others

USN-4990-1: Nettle vulnerabilities

17 June 2021

Several security issues were fixed in Nettle.

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

CVE ID

CVE-2018-16869, CVE-2021-3580

USN-4989-1: BlueZ vulnerabilities

16 June 2021

Several security issues were fixed in BlueZ.

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

CVE ID

CVE-2021-3588, CVE-2020-26558, CVE-2020-27153

USN-4987-1: ExifTool vulnerability

10 June 2021

libimage-exiftool-perl could be made to crash if it opened a specially crafted file.

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

CVE ID

CVE-2021-22204

USN-4985-1: Intel Microcode vulnerabilities

9 June 2021

Several security issues were fixed in Intel Microcode.

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

CVE ID

CVE-2020-24512, CVE-2020-24513, CVE-2020-24511 + 1 other

USN-4937-2: GNOME Autoar regression

7 June 2021

USN-4937-1 introduced a regression in GNOME Autoar.

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

USN-4969-3: DHCP regression

7 June 2021

USN-4969-1 introduced a regression in DHCP.

  • Ubuntu 21.04

USN-4981-1: Squid vulnerabilities

3 June 2021

Several security issues were fixed in Squid.

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

CVE ID

CVE-2021-28651, CVE-2021-28652, CVE-2021-31806 + 4 others

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