Ubuntu 3099-2: Linux kernel (Xenial HWE) vulnerabilities

    Date 11 Oct 2016
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-3099-2
    October 11, 2016
    linux-lts-xenial vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 14.04 LTS
    Several security issues were fixed in the kernel.
    Software Description:
    - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
    USN-3099-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
    14.04 LTS.
    Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB
    Generic Receive Offload (GRO) processing implementations in the Linux
    kernel, A remote attacker could use this to cause a stack corruption,
    leading to a denial of service (system crash). (CVE-2016-7039)
    Marco Grassi discovered a use-after-free condition could occur in the TCP
    retransmit queue handling code in the Linux kernel. A local attacker could
    use this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2016-6828)
    Pengfei Wang discovered a race condition in the Adaptec AAC RAID controller
    driver in the Linux kernel when handling ioctl()s. A local attacker could
    use this to cause a denial of service (system crash). (CVE-2016-6480)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 14.04 LTS:
      linux-image-4.4.0-42-generic    4.4.0-42.62~14.04.1
      linux-image-4.4.0-42-generic-lpae  4.4.0-42.62~14.04.1
      linux-image-4.4.0-42-lowlatency  4.4.0-42.62~14.04.1
      linux-image-4.4.0-42-powerpc-e500mc  4.4.0-42.62~14.04.1
      linux-image-4.4.0-42-powerpc-smp  4.4.0-42.62~14.04.1
      linux-image-4.4.0-42-powerpc64-emb  4.4.0-42.62~14.04.1
      linux-image-4.4.0-42-powerpc64-smp  4.4.0-42.62~14.04.1
    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-2016-6480, CVE-2016-6828, CVE-2016-7039
    Package Information:

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