CWE
119 190 416
Advisory Published

USN-5863-1: Linux kernel (Azure) vulnerabilities

First published: Thu Feb 09 2023(Updated: )

It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-43945) Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation in the Linux kernel contained multiple use-after-free vulnerabilities. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-42896) It was discovered that the Xen netback driver in the Linux kernel did not properly handle packets structured in certain ways. An attacker in a guest VM could possibly use this to cause a denial of service (host NIC availability). (CVE-2022-3643) It was discovered that an integer overflow vulnerability existed in the Bluetooth subsystem in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2022-45934)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-azure<4.15.0.1159.144
4.15.0.1159.144
=16.04
All of
ubuntu/linux-image-4.15.0-1159-azure<4.15.0-1159.174~16.04.1
4.15.0-1159.174~16.04.1
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2022-43945?

    The severity of CVE-2022-43945 is high.

  • How can a remote attacker exploit CVE-2022-43945?

    A remote attacker can exploit CVE-2022-43945 by sending specially crafted RPC messages, leading to a buffer overflow and possibly executing arbitrary code.

  • What is the affected software for CVE-2022-43945?

    The affected software for CVE-2022-43945 is Ubuntu Linux kernel versions 4.15.0.1159.144 and 4.15.0-1159-azure.

  • How do I fix CVE-2022-43945?

    To fix CVE-2022-43945, update your system to Ubuntu Linux kernel version 4.15.0.1159.144 or 4.15.0-1159-azure, depending on the package.

  • Where can I find more information about CVE-2022-43945?

    You can find more information about CVE-2022-43945 at the following reference: [CVE-2022-43945](https://ubuntu.com/security/CVE-2022-43945)

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