Debian: DSA-3396-1: linux security update

    Date10 Nov 2015
    CategoryDebian
    84
    Posted ByLinuxSecurity Advisories
    Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service. CVE-2015-5307
    
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    Debian Security Advisory DSA-3396-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    November 10, 2015                     https://www.debian.org/security/faq
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    Package        : linux
    CVE ID         : CVE-2015-5307 CVE-2015-7833 CVE-2015-7872 CVE-2015-7990
    
    Several vulnerabilities have been discovered in the Linux kernel that
    may lead to a denial of service.
    
    CVE-2015-5307
    
        Ben Serebrin from Google discovered a guest to host denial of
        service flaw affecting the KVM hypervisor. A malicious guest can
        trigger an infinite stream of "alignment check" (#AC) exceptions
        causing the processor microcode to enter an infinite loop where the
        core never receives another interrupt. This leads to a panic of the
        host kernel.
    
    CVE-2015-7833
    
        Sergej Schumilo, Hendrik Schwartke and Ralf Spenneberg discovered a
        flaw in the processing of certain USB device descriptors in the
        usbvision driver. An attacker with physical access to the system can
        use this flaw to crash the system.
    
    CVE-2015-7872
    
        Dmitry Vyukov discovered a vulnerability in the keyrings garbage
        collector allowing a local user to trigger a kernel panic.
    
    CVE-2015-7990
    
        It was discovered that the fix for CVE-2015-6937 was incomplete. A
        race condition when sending a message on unbound socket can still
        cause a NULL pointer dereference. A remote attacker might be able to
        cause a denial of service (crash) by sending a crafted packet.
    
    For the oldstable distribution (wheezy), these problems have been fixed
    in version 3.2.68-1+deb7u6.
    
    For the stable distribution (jessie), these problems have been fixed in
    version 3.16.7-ckt11-1+deb8u6.
    
    We recommend that you upgrade your linux packages.
    
    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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