CWE
416
Advisory Published

USN-6321-1: Linux kernel vulnerabilities

First published: Wed Aug 30 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 netfilter subsystem in the Linux kernel did not properly handle certain error conditions, 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-2023-3610) 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) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle table rules flush in certain circumstances. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-3777) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle rule additions to bound chains in certain circumstances. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-3995) It was discovered that the netfilter subsystem in the Linux kernel did not properly handle PIPAPO element removal, leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-4004) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle bound chain deactivation in certain circumstances. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-4015)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-6.2.0-1003-starfive<6.2.0-1003.3
6.2.0-1003.3
=23.04
All of
ubuntu/linux-image-6.2.0-1012-gcp<6.2.0-1012.12
6.2.0-1012.12
=23.04
All of
ubuntu/linux-image-gcp<6.2.0.1012.12
6.2.0.1012.12
=23.04
All of
ubuntu/linux-image-starfive<6.2.0.1003.6
6.2.0.1003.6
=23.04

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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 does this vulnerability allow an attacker to do?

    This vulnerability allows a local unprivileged user to obtain sensitive information.

  • What is the affected software for this vulnerability?

    The affected software for this vulnerability is Ubuntu 23.04 with the package linux-image-6.2.0-1003-starfive version 6.2.0-1003.3.

  • Is there a fix available for this vulnerability?

    Yes, the fix for this vulnerability is to update to version 6.2.0-1003.3 of the linux-image-6.2.0-1003-starfive package.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability on the Ubuntu Security Notices website using the reference link.

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