CWE
416
Advisory Published

USN-6324-1: Linux kernel (GKE) vulnerabilities

First published: Thu Aug 31 2023(Updated: )

Daniel Moghimi discovered that some Intel(R) Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. (CVE-2022-40982) Tavis Ormandy discovered that some AMD processors did not properly handle speculative execution of certain vector register instructions. A local attacker could use this to expose sensitive information. (CVE-2023-20593) It was discovered that the universal 32bit network packet classifier implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3609) It was discovered that the Quick Fair Queueing network scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3611) It was discovered that the network packet classifier with netfilter/firewall marks implementation in the Linux kernel did not properly handle reference counting, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3776)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-5.4.0-1075-gkeop<5.4.0-1075.79
5.4.0-1075.79
=20.04
All of
ubuntu/linux-image-gkeop<5.4.0.1075.73
5.4.0.1075.73
=20.04
All of
ubuntu/linux-image-gkeop-5.4<5.4.0.1075.73
5.4.0.1075.73
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Linux kernel vulnerability?

    The vulnerability ID for this Linux kernel vulnerability is CVE-2022-40982.

  • What processors are affected by this vulnerability?

    Some Intel(R) Processors are affected by this vulnerability.

  • What is the impact of this vulnerability?

    A local unprivileged user could use this vulnerability to obtain sensitive information.

  • How can I fix this vulnerability?

    Update to the version 5.4.0-1075.79 of the linux-image-5.4.0-1075-gkeop package.

  • Is there any additional information available about this vulnerability?

    Yes, you can find more information about this vulnerability on the Ubuntu Security website.

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