CWE
119 190 416
Advisory Published

USN-5808-1: Linux kernel (IBM) vulnerabilities

First published: Tue Jan 17 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-ibm<5.4.0.1042.53
5.4.0.1042.53
=18.04
All of
ubuntu/linux-image-5.4.0-1042-ibm<5.4.0-1042.47~18.04.1
5.4.0-1042.47~18.04.1
=18.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-5808-1?

    The severity of USN-5808-1 is high.

  • What is the vulnerability described in USN-5808-1?

    USN-5808-1 describes a buffer overflow vulnerability in the NFSD implementation of the Linux kernel.

  • What is the impact of the vulnerability described in USN-5808-1?

    The vulnerability in USN-5808-1 can lead to a denial of service (system crash) or possible execution of arbitrary code.

  • How can I fix the vulnerability described in USN-5808-1?

    To fix the vulnerability described in USN-5808-1, update your system with the specified version of the Linux kernel.

  • Is my system affected by the vulnerability described in USN-5808-1?

    Your system is affected if you are using the specified versions of Ubuntu and the Linux kernel.

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