CWE
416
Advisory Published

USN-6329-1: Linux kernel 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-5.4.0-1107-oracle<5.4.0-1107.116~18.04.1
5.4.0-1107.116~18.04.1
=18.04
All of
ubuntu/linux-image-5.4.0-1111-gcp<5.4.0-1111.120~18.04.1
5.4.0-1111.120~18.04.1
=18.04
All of
ubuntu/linux-image-gcp<5.4.0.1111.87
5.4.0.1111.87
=18.04
All of
ubuntu/linux-image-oracle<5.4.0.1107.116~18.04.79
5.4.0.1107.116~18.04.79
=18.04

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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 is CVE-2022-40982.

  • What is the impact of CVE-2022-40982?

    The impact of CVE-2022-40982 is that a local unprivileged user could use it to obtain sensitive information.

  • Which Intel processors are affected by CVE-2022-40982?

    Some Intel processors are affected by CVE-2022-40982, but the specific models are not mentioned in the advisory.

  • How do I fix CVE-2022-40982 on Ubuntu 18.04?

    To fix CVE-2022-40982 on Ubuntu 18.04, you need to update the linux-image-5.4.0-1107-oracle package to version 5.4.0-1107.116~18.04.1.

  • Where can I find more information about this vulnerability?

    You can find more information about CVE-2022-40982 on the Ubuntu website.

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