• [SECURITY] [DSA 4196-1] linux security update

    From Salvatore Bonaccorso@1:229/2 to All on Wed May 9 00:00:02 2018
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-4196-1 [email protected] 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: [email protected]
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