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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91 - 100 of 178 results

USN-5057-1: Squashfs-Tools vulnerability

31 August 2021

squashfs-tools could be made to overwrite files.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-40153

USN-5056-1: APR vulnerability

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

CVE ID

CVE-2021-35940

USN-5055-1: GNOME grilo vulnerability

30 August 2021

grilo could be made to allow MITM attacks.

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

CVE ID

CVE-2021-39365

USN-5053-1: libssh vulnerability

26 August 2021

libssh could be made to crash or run programs if it received specially crafted network traffic.

  • Ubuntu 21.04 ,
  • 20.04 LTS

CVE ID

CVE-2021-3634

USN-5037-2: Firefox regression

25 August 2021

USN-5037-1 caused a regression in Firefox.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

USN-5051-1: OpenSSL vulnerabilities

24 August 2021

Several security issues were fixed in OpenSSL.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-3711, CVE-2021-3712

USN-5047-1: Firefox vulnerability

19 August 2021

Firefox could be made to incorrectly accept newlines in HTTP/3 response headers.

  • Ubuntu 21.04 ,
  • 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2021-29991

USN-5046-1: Linux kernel vulnerabilities

18 August 2021

Several security issues were fixed in the Linux kernel.

  • Ubuntu 21.04 ,
  • 20.04 LTS

CVE ID

CVE-2021-0129, CVE-2020-26558, CVE-2021-28691 + 3 others

USN-5043-1: Exiv2 vulnerabilities

17 August 2021

Several security issues were fixed in Exiv2.

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

CVE ID

CVE-2021-37622, CVE-2021-32815, CVE-2021-37623 + 8 others

USN-5042-1: HAProxy vulnerabilities

17 August 2021

Several security issues were fixed in HAProxy.

  • Ubuntu 21.04 ,
  • 20.04 LTS
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