CWE
362
Advisory Published

USN-3901-1: Linux kernel vulnerabilities

First published: Tue Mar 05 2019(Updated: )

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) It was discovered that the crypto subsystem of the Linux kernel leaked uninitialized memory to user space in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-19854) 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-4.15.0-1009-oracle<4.15.0-1009.11
4.15.0-1009.11
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1028-gcp<4.15.0-1028.29
4.15.0-1028.29
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1030-kvm<4.15.0-1030.30
4.15.0-1030.30
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1032-raspi2<4.15.0-1032.34
4.15.0-1032.34
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1033-aws<4.15.0-1033.35
4.15.0-1033.35
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-1034-oem<4.15.0-1034.39
4.15.0-1034.39
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-46-generic<4.15.0-46.49
4.15.0-46.49
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-46-generic-lpae<4.15.0-46.49
4.15.0-46.49
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-46-lowlatency<4.15.0-46.49
4.15.0-46.49
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-4.15.0-46-snapdragon<4.15.0-46.49
4.15.0-46.49
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-aws<4.15.0.1033.32
4.15.0.1033.32
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-gcp<4.15.0.1028.30
4.15.0.1028.30
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-generic<4.15.0.46.48
4.15.0.46.48
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-generic-lpae<4.15.0.46.48
4.15.0.46.48
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-gke<4.15.0.1028.30
4.15.0.1028.30
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-kvm<4.15.0.1030.30
4.15.0.1030.30
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-lowlatency<4.15.0.46.48
4.15.0.46.48
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-oem<4.15.0.1034.39
4.15.0.1034.39
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-oracle<4.15.0.1009.12
4.15.0.1009.12
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-raspi2<4.15.0.1032.30
4.15.0.1032.30
Ubuntu Ubuntu=18.04
All of
ubuntu/linux-image-snapdragon<4.15.0.46.48
4.15.0.46.48
Ubuntu Ubuntu=18.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this advisory?

    The vulnerability ID for this advisory is CVE-2018-18397.

  • How does the vulnerability in the Linux kernel affect the system?

    The vulnerability in the Linux kernel allows a local attacker to possibly modify files.

  • What versions of Ubuntu are affected by this vulnerability?

    This vulnerability affects Ubuntu 18.04.

  • What is the remedy for this vulnerability?

    The remedy for this vulnerability is to install the specific kernel version mentioned in the advisory.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability at the following link: [link](https://ubuntu.com/security/CVE-2018-18397).

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