Ubuntu 3036-1: Linux kernel (Utopic HWE) vulnerability

    Date14 Jul 2016
    CategoryUbuntu
    92
    Posted ByLinuxSecurity Advisories
    The system could be made to crash under certain conditions.
    ==========================================================================
    Ubuntu Security Notice USN-3036-1
    July 14, 2016
    
    linux-lts-utopic vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    The system could be made to crash under certain conditions.
    
    Software Description:
    - linux-lts-utopic: Linux hardware enablement kernel from Utopic for Trusty
    
    Details:
    
    Jan Stancek discovered that the Linux kernel's memory manager did not
    properly handle moving pages mapped by the asynchronous I/O (AIO) ring
    buffer to the other nodes. A local attacker could use this to cause a
    denial of service (system crash).
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.16.0-77-generic   3.16.0-77.99~14.04.1
      linux-image-3.16.0-77-generic-lpae  3.16.0-77.99~14.04.1
      linux-image-3.16.0-77-lowlatency  3.16.0-77.99~14.04.1
      linux-image-3.16.0-77-powerpc-e500mc  3.16.0-77.99~14.04.1
      linux-image-3.16.0-77-powerpc-smp  3.16.0-77.99~14.04.1
      linux-image-3.16.0-77-powerpc64-emb  3.16.0-77.99~14.04.1
      linux-image-3.16.0-77-powerpc64-smp  3.16.0-77.99~14.04.1
    
    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.
    
    References:
      http://www.ubuntu.com/usn/usn-3036-1
      CVE-2016-3070
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-77.99~14.04.1
    
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