Ubuntu 2871-1: Linux kernel vulnerability

    Date19 Jan 2016
    Posted ByLinuxSecurity Advisories
    The system could be made to crash or run programs as an administrator.
    Ubuntu Security Notice USN-2871-1
    January 19, 2016
    linux vulnerability
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 15.04
    The system could be made to crash or run programs as an administrator.
    Software Description:
    - linux: Linux kernel
    Yevgeny Pats discovered that the session keyring implementation in the
    Linux kernel did not properly reference count when joining an existing
    session keyring. A local attacker could use this to cause a denial of
    service (system crash) or possibly execute arbitrary code with
    administrative privileges.
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 15.04:
      linux-image-3.19.0-47-generic   3.19.0-47.53
      linux-image-3.19.0-47-generic-lpae  3.19.0-47.53
      linux-image-3.19.0-47-lowlatency  3.19.0-47.53
      linux-image-3.19.0-47-powerpc-e500mc  3.19.0-47.53
      linux-image-3.19.0-47-powerpc-smp  3.19.0-47.53
      linux-image-3.19.0-47-powerpc64-emb  3.19.0-47.53
      linux-image-3.19.0-47-powerpc64-smp  3.19.0-47.53
    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.
    Package Information:
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