CWE
190 416 362 369
Advisory Published

USN-5791-3: Linux kernel (Azure) vulnerabilities

First published: Tue Jan 10 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-fde<5.4.0.1100.106+cvm1.35
5.4.0.1100.106+cvm1.35
=20.04
All of
ubuntu/linux-image-5.4.0-1100-azure-fde<5.4.0-1100.106+cvm1.1
5.4.0-1100.106+cvm1.1
=20.04
All of
ubuntu/linux-image-azure<5.4.0.1100.73
5.4.0.1100.73
=18.04
All of
ubuntu/linux-image-5.4.0-1100-azure<5.4.0-1100.106~18.04.1
5.4.0-1100.106~18.04.1
=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 for this Linux kernel vulnerability is CVE-2022-20421.

  • What is the impact of the vulnerability (CVE-2022-20421) on the affected systems?

    The vulnerability (CVE-2022-20421) can be exploited by a local attacker to cause a denial of service (system crash) or potentially execute arbitrary code.

  • Which Linux kernel versions are affected by this vulnerability (CVE-2022-20421)?

    The Linux kernel versions affected by this vulnerability (CVE-2022-20421) are 5.4.0.1100.106+cvm1.35, 5.4.0-1100.106+cvm1.1, 5.4.0.1100.73, and 5.4.0-1100.106~18.04.1.

  • Which Ubuntu versions are affected by this Linux kernel vulnerability (CVE-2022-20421)?

    The Ubuntu versions affected by this Linux kernel vulnerability (CVE-2022-20421) are 20.04 and 18.04.

  • Where can I find more information about this Linux kernel vulnerability (CVE-2022-20421)?

    You can find more information about this Linux kernel vulnerability (CVE-2022-20421) on the Ubuntu Security website.

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