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    Ubuntu 3910-1: Linux kernel vulnerabilities

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    Several security issues were fixed in the Linux kernel.
    Ubuntu Security Notice USN-3910-1
    March 15, 2019
    linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 16.04 LTS
    Several security issues were fixed in the Linux kernel.
    Software Description:
    - linux: Linux kernel
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    - linux-snapdragon: Linux kernel for Snapdragon processors
    It was discovered that the f2fs filesystem implementation in the Linux
    kernel did not handle the noflush_merge mount option correctly. An attacker
    could use this to cause a denial of service (system crash).
    It was discovered that the procfs filesystem did not properly handle
    processes mapping some memory elements onto files. A local attacker could
    use this to block utilities that examine the procfs filesystem to report
    operating system state, such as ps(1). (CVE-2018-1120)
    Hui Peng and Mathias Payer discovered that the Option USB High Speed driver
    in the Linux kernel did not properly validate metadata received from the
    device. A physically proximate attacker could use this to cause a denial of
    service (system crash). (CVE-2018-19985)
    It was discovered that multiple integer overflows existed in the hugetlbfs
    implementation in the Linux kernel. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2018-7740)
    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)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 16.04 LTS:
      linux-image-4.4.0-1041-kvm      4.4.0-1041.47
      linux-image-4.4.0-1077-aws      4.4.0-1077.87
      linux-image-4.4.0-1104-raspi2   4.4.0-1104.112
      linux-image-4.4.0-1108-snapdragon  4.4.0-1108.113
      linux-image-4.4.0-143-generic   4.4.0-143.169
      linux-image-4.4.0-143-generic-lpae  4.4.0-143.169
      linux-image-4.4.0-143-lowlatency  4.4.0-143.169
      linux-image-4.4.0-143-powerpc-e500mc  4.4.0-143.169
      linux-image-4.4.0-143-powerpc-smp  4.4.0-143.169
      linux-image-4.4.0-143-powerpc64-emb  4.4.0-143.169
      linux-image-4.4.0-143-powerpc64-smp  4.4.0-143.169
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.
      CVE-2017-18241, CVE-2018-1120, CVE-2018-19985, CVE-2018-7740,
    Package Information:

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