Advisory Published

USN-5572-1: Linux kernel (AWS) vulnerabilities

First published: Thu Aug 18 2022(Updated: )

Roger Pau Monné discovered that the Xen virtual block driver in the Linux kernel did not properly initialize memory pages to be used for shared communication with the backend. A local attacker could use this to expose sensitive information (guest kernel memory). (CVE-2022-26365) Roger Pau Monné discovered that the Xen paravirtualization frontend in the Linux kernel did not properly initialize memory pages to be used for shared communication with the backend. A local attacker could use this to expose sensitive information (guest kernel memory). (CVE-2022-33740) It was discovered that the Xen paravirtualization frontend in the Linux kernel incorrectly shared unrelated data when communicating with certain backends. A local attacker could use this to cause a denial of service (guest crash) or expose sensitive information (guest kernel memory). (CVE-2022-33741)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-aws<4.4.0.1148.152
4.4.0.1148.152
=16.04
All of
ubuntu/linux-image-4.4.0-1148-aws<4.4.0-1148.163
4.4.0-1148.163
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2022-26365?

    The severity of CVE-2022-26365 is high.

  • How does CVE-2022-26365 impact Linux kernel on AWS?

    CVE-2022-26365 can be exploited by a local attacker to expose sensitive information (guest kernel memory) on Linux kernel running on AWS.

  • How do I fix CVE-2022-26365 on Ubuntu 16.04 with the linux-image-aws package?

    To fix CVE-2022-26365 on Ubuntu 16.04 with the linux-image-aws package, update to version 4.4.0.1148.152 or later.

  • How do I fix CVE-2022-26365 on Ubuntu 16.04 with the linux-image-4.4.0-1148-aws package?

    To fix CVE-2022-26365 on Ubuntu 16.04 with the linux-image-4.4.0-1148-aws package, update to version 4.4.0-1148.163 or later.

  • Where can I find more information about CVE-2022-26365?

    You can find more information about CVE-2022-26365 at the following reference: [Ubuntu CVE-2022-26365](https://ubuntu.com/security/CVE-2022-26365).

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