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    Debian LTS: DLA-1989-1: linux security update

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    Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service, or information leak.
    Package        : linux
    Version        : 3.16.76-1
    CVE ID         : CVE-2019-0154 CVE-2019-11135
    Several vulnerabilities have been discovered in the Linux kernel that
    may lead to a privilege escalation, denial of service, or information
        Intel discovered that on their 8th and 9th generation GPUs,
        reading certain registers while the GPU is in a low-power state
        can cause a system hang.  A local user permitted to use the GPU
        can use this for denial of service.
        This update mitigates the issue through changes to the i915
        The affected chips (gen8) are listed at
        It was discovered that on Intel CPUs supporting transactional
        memory (TSX), a transaction that is going to be aborted may
        continue to execute speculatively, reading sensitive data from
        internal buffers and leaking it through dependent operations.
        Intel calls this "TSX Asynchronous Abort" (TAA).
        For CPUs affected by the previously published Microarchitectural
        Data Sampling (MDS) issues (CVE-2018-12126, CVE-2018-12127,
        CVE-2018-12130, CVE-2019-11091), the existing mitigation also
        mitigates this issue.
        For processors that are vulnerable to TAA but not MDS, this update
        disables TSX by default.  This mitigation requires updated CPU
        microcode.  An updated intel-microcode package (only available in
        Debian non-free) will be provided via a future DLA.  The updated
        CPU microcode may also be available as part of a system firmware
        ("BIOS") update.
        Further information on the mitigation can be found at
        or in the linux-doc-3.16 package.
        Intel's explanation of the issue can be found at
    For Debian 8 "Jessie", these problems have been fixed in version
    3.16.76-1.  This update also includes other fixes from upstream stable
    We recommend that you upgrade your linux packages.
    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at:
    Ben Hutchings - Debian developer, member of kernel, installer and LTS teams


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