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-5088-1: EDK II vulnerabilities

23 September 2021

Several security issues were fixed in EDK II.

  • Ubuntu 21.04 ,
  • 20.04 LTS

CVE ID

CVE-2019-11098, CVE-2021-3712, CVE-2021-23840 + 1 other

USN-5087-1: WebKitGTK vulnerabilities

22 September 2021

Several security issues were fixed in WebKitGTK.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-30858

USN-5086-1: Linux kernel vulnerability

22 September 2021

IBM s390x systems could be made to crash or run programs as an administrator.

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

USN-5085-1: SQL parse vulnerability

22 September 2021

SQL parse could be made to denial of service if it received a specially crafted regular expression.

  • Ubuntu 21.04

CVE ID

CVE-2021-32839

USN-5080-1: Libgcrypt vulnerabilities

16 September 2021

Libgcrypt could be made to expose sensitive information.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-33560, CVE-2021-40528

USN-5079-1: curl vulnerabilities

15 September 2021

Several security issues were fixed in curl.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-22947, CVE-2021-22945, CVE-2021-22946

USN-5078-1: Squashfs-Tools vulnerability

15 September 2021

Squashfs-Tools could be made to overwrite files.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-41072

USN-5077-1: Apport vulnerabilities

14 September 2021

Several security issues were fixed in Apport.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-3710, CVE-2021-3709

USN-5075-1: Ghostscript vulnerability

10 September 2021

Ghostscript could be made to crash, access files, or run programs if it opened a specially crafted file.

  • Ubuntu 21.04 ,
  • 20.04 LTS

CVE ID

CVE-2021-3781

USN-5074-1: Firefox vulnerabilities

9 September 2021

Firefox could be made to crash or run programs as your login if it opened a malicious website.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-38493, CVE-2021-38494, CVE-2021-38491

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