Ubuntu 4253-1: Linux kernel vulnerability

    Date 27 Jan 2020
    258
    Posted By LinuxSecurity Advisories
    The Linux kernel could be made to expose sensitive information.
    ==========================================================================
    Ubuntu Security Notice USN-4253-1
    January 28, 2020
    
    linux, linux-aws vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    
    Summary:
    
    The Linux kernel could be made to expose sensitive information.
    
    Software Description:
    - linux: Linux kernel
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    
    Details:
    
    It was discovered that the Linux kernel did not properly clear data
    structures on context switches for certain Intel graphics processors. A
    local attacker could use this to expose sensitive information.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      linux-image-5.3.0-1010-aws      5.3.0-1010.11
      linux-image-5.3.0-29-generic    5.3.0-29.31
      linux-image-5.3.0-29-generic-lpae  5.3.0-29.31
      linux-image-5.3.0-29-lowlatency  5.3.0-29.31
      linux-image-5.3.0-29-snapdragon  5.3.0-29.31
      linux-image-aws                 5.3.0.1010.12
      linux-image-generic             5.3.0.29.33
      linux-image-generic-lpae        5.3.0.29.33
      linux-image-lowlatency          5.3.0.29.33
      linux-image-virtual             5.3.0.29.33
    
    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:
      https://usn.ubuntu.com/4253-1
      CVE-2019-14615
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/5.3.0-29.31
      https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1010.11
    

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