CWE
362
Advisory Published

USN-3903-2: Linux kernel (HWE) vulnerabilities

First published: Wed Mar 06 2019(Updated: )

USN-3903-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS. Jason Wang discovered that the vhost net driver in the Linux kernel contained an out of bounds write vulnerability. An attacker in a guest virtual machine could use this to cause a denial of service (host system crash) or possibly execute arbitrary code in the host kernel. (CVE-2018-16880) Jann Horn discovered that the userfaultd implementation in the Linux kernel did not properly restrict access to certain ioctls. A local attacker could use this possibly to modify files. (CVE-2018-18397) Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations. (CVE-2019-6133)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-4.18.0-1013-azure<4.18.0-1013.13~18.04.1
4.18.0-1013.13~18.04.1
=18.04
All of
ubuntu/linux-image-4.18.0-16-generic<4.18.0-16.17~18.04.1
4.18.0-16.17~18.04.1
=18.04
All of
ubuntu/linux-image-4.18.0-16-generic-lpae<4.18.0-16.17~18.04.1
4.18.0-16.17~18.04.1
=18.04
All of
ubuntu/linux-image-4.18.0-16-lowlatency<4.18.0-16.17~18.04.1
4.18.0-16.17~18.04.1
=18.04
All of
ubuntu/linux-image-4.18.0-16-snapdragon<4.18.0-16.17~18.04.1
4.18.0-16.17~18.04.1
=18.04
All of
ubuntu/linux-image-azure<4.18.0.1013.12
4.18.0.1013.12
=18.04
All of
ubuntu/linux-image-generic-hwe-18.04<4.18.0.16.66
4.18.0.16.66
=18.04
All of
ubuntu/linux-image-generic-lpae-hwe-18.04<4.18.0.16.66
4.18.0.16.66
=18.04
All of
ubuntu/linux-image-lowlatency-hwe-18.04<4.18.0.16.66
4.18.0.16.66
=18.04
All of
ubuntu/linux-image-snapdragon-hwe-18.04<4.18.0.16.66
4.18.0.16.66
=18.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-3903-2?

    The severity of USN-3903-2 is not specified in the information provided.

  • How do I fix USN-3903-2?

    To fix USN-3903-2, you should update the Linux kernel to the recommended version provided in the Ubuntu security advisory.

  • What is the vulnerability ID associated with USN-3903-2?

    The vulnerability IDs associated with USN-3903-2 are CVE-2018-16880, CVE-2018-18397, and CVE-2019-6133.

  • Is Ubuntu 18.04 LTS affected by USN-3903-2?

    Yes, Ubuntu 18.04 LTS is affected by USN-3903-2.

  • Where can I find more information about USN-3903-2?

    You can find more information about USN-3903-2 on the Ubuntu security advisory page provided in the references section.

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