CWE
190 416 362 369
Advisory Published

USN-5791-2: Linux kernel (Azure) vulnerabilities

First published: Mon Jan 09 2023(Updated: )

It was discovered that a race condition existed in the Android Binder IPC subsystem in the Linux kernel, 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-2022-20421) David Leadbeater discovered that the netfilter IRC protocol tracking implementation in the Linux Kernel incorrectly handled certain message payloads in some situations. A remote attacker could possibly use this to cause a denial of service or bypass firewall filtering. (CVE-2022-2663) It was discovered that the Intel 740 frame buffer driver in the Linux kernel contained a divide by zero vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-3061) It was discovered that the sound subsystem in the Linux kernel contained a race condition in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-3303) Gwnaun Jung discovered that the SFB packet scheduling implementation in the Linux kernel contained 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-2022-3586) It was discovered that the NILFS2 file system implementation in the Linux kernel did not properly deallocate memory in certain error conditions. An attacker could use this to cause a denial of service (memory exhaustion). (CVE-2022-3646) Hyunwoo Kim discovered that an integer overflow vulnerability existed in the PXA3xx graphics driver in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-39842) It was discovered that a race condition existed in the EFI capsule loader driver in the Linux kernel, 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-2022-40307) Zheng Wang and Zhuorao Yang discovered that the RealTek RTL8712U wireless driver in the Linux kernel contained 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-2022-4095) It was discovered that the USB monitoring (usbmon) component in the Linux kernel did not properly set permissions on memory mapped in to user space processes. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-43750) Jann Horn discovered a race condition existed in the Linux kernel when unmapping VMAs in certain situations, resulting in possible use-after-free vulnerabilities. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-39188)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-azure-lts-20.04<5.4.0.1100.93
5.4.0.1100.93
=20.04
All of
ubuntu/linux-image-5.4.0-1100-azure<5.4.0-1100.106
5.4.0-1100.106
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is USN-5791-2.

  • What is the severity of the vulnerability?

    The severity of the vulnerability is not mentioned in the description.

  • How does the vulnerability impact the Linux kernel (Azure)?

    The vulnerability in the Linux kernel (Azure) can lead to a use-after-free vulnerability, causing a denial of service or possible arbitrary code execution.

  • How can I fix the vulnerability?

    To fix the vulnerability, update the Linux kernel to version 5.4.0.1100.93 or later for linux-image-azure-lts-20.04 package, or version 5.4.0-1100.106 or later for linux-image-5.4.0-1100-azure package.

  • Where can I find more information about the vulnerability?

    You can find more information about the vulnerability on the Ubuntu Security Notices website using the provided references: CVE-2022-39842, CVE-2022-3586, and CVE-2022-39188.

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