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-6251-1: Linux kernel vulnerabilities

26 July 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 20.04 LTS,
  • 18.04 LTS

CVE ID

CVE-2023-35001, CVE-2023-3090, CVE-2023-32629 + 1 other

USN-6246-1: Linux kernel vulnerabilities

25 July 2023

Several security issues were fixed in the Linux kernel.

  • Ubuntu 22.04 LTS,
  • 20.04 LTS

CVE ID

CVE-2023-3390, CVE-2023-3090, CVE-2023-3389 + 3 others

USN-6244-1: AMD Microcode vulnerability

25 July 2023

AMD processors may allow an attacker to expose sensitive information due to a vector register speculative execution vulnerability.

  • Ubuntu 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2023-20593

LSN-0096-1: Kernel Live Patch Security Notice

25 July 2023

Several security issues were fixed in the kernel.

  • Ubuntu 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2023-31436, CVE-2023-35001, CVE-2023-30456 + 2 others

USN-6243-1: Graphite-Web vulnerabilities

25 July 2023

Several security issues were fixed in Graphite-Web.

  • Ubuntu 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2022-4730, CVE-2017-18638, CVE-2022-4728 + 1 other

USN-6242-1: OpenSSH vulnerability

24 July 2023

OpenSSH could be made to run programs as your login when using ssh-agent forwarding.

  • Ubuntu 23.04 ,
  • 22.04 LTS,
  • 20.04 LTS

CVE ID

CVE-2023-38408

USN-6232-1: wkhtmltopdf vulnerability

20 July 2023

wkhtmltopdf could be made to expose sensitive information if it opened a specially crafted file.

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

CVE ID

CVE-2020-21365

USN-6239-1: ECDSA Util vulnerability

20 July 2023

ECDSA Util could be made to accept forged signatures.

  • Ubuntu 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2022-24884

USN-6238-1: Samba vulnerabilities

19 July 2023

Several security issues were fixed in Samba.

  • Ubuntu 23.04 ,
  • 22.10 ,
  • 22.04 LTS,
  • 20.04 LTS

CVE ID

CVE-2023-3347, CVE-2023-34967, CVE-2023-34968 + 2 others

USN-6237-1: curl vulnerabilities

19 July 2023

Several security issues were fixed in curl.

  • Ubuntu 23.04 ,
  • 22.10 ,
  • 22.04 LTS,
  • 20.04 LTS

CVE ID

CVE-2023-28321, CVE-2023-28322, CVE-2023-32001

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