Ubuntu 3035-3: Linux kernel (Wily HWE) vulnerability

    Date14 Jul 2016
    61
    Posted ByLinuxSecurity Advisories
    The system could be made to crash under certain conditions.
    ==========================================================================
    Ubuntu Security Notice USN-3035-3
    July 14, 2016
    
    linux-lts-wily 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-wily: Linux hardware enablement kernel from Wily for Trusty
    
    Details:
    
    USN-3035-1 fixed vulnerabilities in the Linux kernel for Ubuntu 15.10.
    This update provides the corresponding updates for the Linux Hardware
    Enablement (HWE) kernel from Ubuntu 15.10 for Ubuntu 14.04 LTS.
    
    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-4.2.0-42-generic    4.2.0-42.49~14.04.1
      linux-image-4.2.0-42-generic-lpae  4.2.0-42.49~14.04.1
      linux-image-4.2.0-42-lowlatency  4.2.0-42.49~14.04.1
      linux-image-4.2.0-42-powerpc-e500mc  4.2.0-42.49~14.04.1
      linux-image-4.2.0-42-powerpc-smp  4.2.0-42.49~14.04.1
      linux-image-4.2.0-42-powerpc64-emb  4.2.0-42.49~14.04.1
      linux-image-4.2.0-42-powerpc64-smp  4.2.0-42.49~14.04.1
    
    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-3035-3
      http://www.ubuntu.com/usn/usn-3035-1
      CVE-2016-3070
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-wily/4.2.0-42.49~14.04.1
    
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