CERT-FR Advisory: Multiple Vulnerabilities in Ubuntu’s Linux Kernel

The French Computer Emergency Response Team (CERT-FR) has issued an advisory regarding several vulnerabilities identified in the Linux kernel of Ubuntu. These vulnerabilities, tracked under the reference CERTFR-2023-AVI-0977, were disclosed in various security bulletins released by Ubuntu.

Document Management:

  • Reference: CERTFR-2023-AVI-0977
  • Title: Multiple Vulnerabilities in Ubuntu’s Linux Kernel
  • Date of First Version: November 24, 2023
  • Date of Last Version: November 24, 2023
  • Source(s): Ubuntu Security Bulletins USN-6502-1, USN-6503-1, USN-6494-1, USN-6496-1, USN-6497-1, USN-6495-1 dated November 21, 2023
  • Attachment(s): None

Risks: The identified vulnerabilities pose the following risks:

  • Remote Arbitrary Code Execution
  • Denial of Service
  • Compromise of Data Confidentiality

Affected Systems: The Ubuntu versions impacted by these vulnerabilities include:

  • Ubuntu 16.04 ESM
  • Ubuntu 18.04 ESM
  • Ubuntu 20.04 LTS
  • Ubuntu 22.04 LTS
  • Ubuntu 23.10

Summary: The security flaws discovered in Ubuntu’s Linux kernel provide an attacker with the ability to execute arbitrary code remotely, cause a denial of service, and compromise data confidentiality.

Solution: It is highly recommended to refer to the security bulletins issued by the publisher (Ubuntu) to obtain the necessary patches. Detailed information on the patches is available in the Documentation section of the bulletin.

Affected users are strongly advised to apply the patches as soon as possible to mitigate the risks associated with these vulnerabilities.