Linux Security
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    Debian: DSA-4196-1: linux security update

    Date
    5526
    Posted By
    Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation or denial of service. CVE-2018-1087
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-4196-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    May 08, 2018                          https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : linux
    CVE ID         : CVE-2018-1087 CVE-2018-8897
    Debian Bug     : 897427 897599 898067 898100
    
    Several vulnerabilities have been discovered in the Linux kernel that
    may lead to a privilege escalation or denial of service.
    
    CVE-2018-1087
    
        Andy Lutomirski discovered that the KVM implementation did not
        properly handle #DB exceptions while deferred by MOV SS/POP SS,
        allowing an unprivileged KVM guest user to crash the guest or
        potentially escalate their privileges.
    
    CVE-2018-8897
    
        Nick Peterson of Everdox Tech LLC discovered that #DB exceptions
        that are deferred by MOV SS or POP SS are not properly handled,
        allowing an unprivileged user to crash the kernel and cause a denial
        of service.
    
    For the oldstable distribution (jessie), these problems have been fixed
    in version 3.16.56-1+deb8u1. This update includes various fixes for
    regressions from 3.16.56-1 as released in DSA-4187-1 (Cf. #897427,
    #898067 and #898100).
    
    For the stable distribution (stretch), these problems have been fixed in
    version 4.9.88-1+deb9u1. The fix for CVE-2018-1108 applied in DSA-4188-1
    is temporarily reverted due to various regression, cf. #897599.
    
    We recommend that you upgrade your linux packages.
    
    For the detailed security status of linux please refer to its security
    tracker page at:
    https://security-tracker.debian.org/tracker/linux
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    

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