Advisory Published

USN-5579-1: Linux kernel vulnerabilities

First published: Wed Aug 24 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-4.4.0-233-lowlatency<4.4.0-233.267
4.4.0-233.267
=16.04
All of
ubuntu/linux-image-virtual<4.4.0.233.239
4.4.0.233.239
=16.04
All of
ubuntu/linux-image-generic<4.4.0.233.239
4.4.0.233.239
=16.04
All of
ubuntu/linux-image-4.4.0-233-generic<4.4.0-233.267
4.4.0-233.267
=16.04
All of
ubuntu/linux-image-4.4.0-1113-kvm<4.4.0-1113.123
4.4.0-1113.123
=16.04
All of
ubuntu/linux-image-kvm<4.4.0.1113.110
4.4.0.1113.110
=16.04
All of
ubuntu/linux-image-lowlatency<4.4.0.233.239
4.4.0.233.239
=16.04
All of
ubuntu/linux-image-4.4.0-233-generic<4.4.0-233.267~14.04.1
4.4.0-233.267~14.04.1
=14.04
All of
ubuntu/linux-image-4.4.0-233-lowlatency<4.4.0-233.267~14.04.1
4.4.0-233.267~14.04.1
=14.04
All of
ubuntu/linux-image-generic-lts-xenial<4.4.0.233.202
4.4.0.233.202
=14.04
All of
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.233.202
4.4.0.233.202
=14.04
All of
ubuntu/linux-image-virtual-lts-xenial<4.4.0.233.202
4.4.0.233.202
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID of this advisory?

    The vulnerability ID of this advisory is CVE-2022-26365.

  • How can a local attacker exploit the vulnerability?

    A local attacker can exploit the vulnerability by using the Xen virtual block driver to expose sensitive information (guest kernel memory).

  • Which Linux kernel versions are affected?

    Linux kernel versions 4.4.0-233.267, 4.4.0.233.239, 4.4.0-1113.123, 4.4.0.1113.110, 4.4.0.233.202, and their corresponding versions with ~14.04.1 or lts-xenial suffix are affected.

  • What is the severity of this vulnerability?

    The severity of the vulnerability is not specified in the advisory.

  • How can I fix the vulnerability?

    To fix the vulnerability, update your Linux kernel to version 4.4.0-233.267 or a later version.

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