CWE
119 190 416
Advisory Published

USN-5802-1: Linux kernel vulnerabilities

First published: Thu Jan 12 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-4.4.0-236-generic<4.4.0-236.270
4.4.0-236.270
=16.04
All of
ubuntu/linux-image-generic<4.4.0.236.242
4.4.0.236.242
=16.04
All of
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.236.242
4.4.0.236.242
=16.04
All of
ubuntu/linux-image-virtual-lts-xenial<4.4.0.236.242
4.4.0.236.242
=16.04
All of
ubuntu/linux-image-virtual<4.4.0.236.242
4.4.0.236.242
=16.04
All of
ubuntu/linux-image-generic-lts-xenial<4.4.0.236.242
4.4.0.236.242
=16.04
All of
ubuntu/linux-image-kvm<4.4.0.1116.113
4.4.0.1116.113
=16.04
All of
ubuntu/linux-image-4.4.0-1116-kvm<4.4.0-1116.126
4.4.0-1116.126
=16.04
All of
ubuntu/linux-image-4.4.0-236-lowlatency<4.4.0-236.270
4.4.0-236.270
=16.04
All of
ubuntu/linux-image-lowlatency<4.4.0.236.242
4.4.0.236.242
=16.04
All of
ubuntu/linux-image-4.4.0-236-generic<4.4.0-236.270~14.04.1
4.4.0-236.270~14.04.1
=14.04
All of
ubuntu/linux-image-generic-lts-xenial<4.4.0.236.205
4.4.0.236.205
=14.04
All of
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.236.205
4.4.0.236.205
=14.04
All of
ubuntu/linux-image-aws<4.4.0.1115.112
4.4.0.1115.112
=14.04
All of
ubuntu/linux-image-4.4.0-1115-aws<4.4.0-1115.121
4.4.0-1115.121
=14.04
All of
ubuntu/linux-image-4.4.0-236-lowlatency<4.4.0-236.270~14.04.1
4.4.0-236.270~14.04.1
=14.04
All of
ubuntu/linux-image-virtual-lts-xenial<4.4.0.236.205
4.4.0.236.205
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

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

    CVE-2022-43945 has a high severity.

  • How does CVE-2022-43945 impact Linux kernel?

    CVE-2022-43945 can cause a denial of service (system crash) or possibly execute arbitrary code.

  • Which version of Ubuntu is affected by CVE-2022-43945?

    Ubuntu 16.04 is affected by CVE-2022-43945.

  • What is the recommended remedy for CVE-2022-43945 on Ubuntu 16.04?

    The recommended remedy for CVE-2022-43945 on Ubuntu 16.04 is to update to version 4.4.0-236.270 of the linux-image-4.4.0-236-generic package.

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

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

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