Advisory Published

USN-6384-1: Linux kernel (OEM) vulnerabilities

First published: Tue Sep 19 2023(Updated: )

Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-20588) Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2023-4569)

Affected SoftwareAffected VersionHow to fix
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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2023-20588?

    The severity of CVE-2023-20588 is high.

  • How can a local attacker exploit CVE-2023-20588?

    A local attacker could exploit CVE-2023-20588 to leak stale data from division operations and expose sensitive information.

  • Which versions of Ubuntu are affected by CVE-2023-20588?

    Ubuntu versions 22.04 are affected by CVE-2023-20588.

  • How can I fix CVE-2023-20588 in Ubuntu?

    Update your Ubuntu system to version 6.1.0-1022.22+1 or later to fix CVE-2023-20588.

  • Where can I find more information about CVE-2023-20588?

    You can find more information about CVE-2023-20588 on the Ubuntu Security Notices website: <a href=''></a>


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