CWE
416 362
Advisory Published

USN-6135-1: Linux kernel (Azure CVM) vulnerabilities

First published: Fri Jun 02 2023(Updated: )

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, 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-2023-32233) Gwangun Jung discovered that the Quick Fair Queueing 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-2023-31436) Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service (guest crash). (CVE-2023-30456) It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform data buffer size validation in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-1380) Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-2612)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-azure-fde<5.15.0.1039.46.16
5.15.0.1039.46.16
=22.04
All of
ubuntu/linux-image-5.15.0-1039-azure-fde<5.15.0-1039.46.1
5.15.0-1039.46.1
=22.04
All of
ubuntu/linux-image-azure-fde<5.15.0.1039.46~20.04.1.18
5.15.0.1039.46~20.04.1.18
=20.04
All of
ubuntu/linux-image-5.15.0-1039-azure-fde<5.15.0-1039.46~20.04.1.1
5.15.0-1039.46~20.04.1.1
=20.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6135-1?

    The severity of USN-6135-1 is not specified.

  • What is the vulnerability description of USN-6135-1?

    USN-6135-1 is a Linux kernel vulnerability that involves a race condition in the netfilter subsystem, leading to a use-after-free vulnerability.

  • How does USN-6135-1 affect the affected software?

    USN-6135-1 affects the Linux kernel versions 5.15.0.1039.46.16, 5.15.0-1039.46.1, 5.15.0.1039.46~20.04.1.18, and 5.15.0-1039.46~20.04.1.1 on Ubuntu 22.04 and Ubuntu 20.04.

  • What are the references for USN-6135-1?

    The references for USN-6135-1 are CVE-2023-32233, CVE-2023-1380, and CVE-2023-2612.

  • How do I fix USN-6135-1?

    To fix USN-6135-1, update to the specified versions of the Linux kernel packages linux-image-azure-fde or linux-image-5.15.0-1039-azure-fde depending on your Ubuntu version.

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