Debian: DSA-4313-1: linux security update

    Date08 Oct 2018
    CategoryDebian
    3783
    Posted ByAnthony Pell
    Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-4313-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    October 08, 2018                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : linux
    CVE ID         : CVE-2018-15471 CVE-2018-18021
    
    Several vulnerabilities have been discovered in the Linux kernel that
    may lead to a privilege escalation, denial of service or information
    leaks.
    
    CVE-2018-15471 (XSA-270)
    
        Felix Wilhelm of Google Project Zero discovered a flaw in the hash
        handling of the xen-netback Linux kernel module. A malicious or
        buggy frontend may cause the (usually privileged) backend to make
        out of bounds memory accesses, potentially resulting in privilege
        escalation, denial of service, or information leaks.
    
        https://xenbits.xen.org/xsa/advisory-270.html
    
    CVE-2018-18021
    
        It was discovered that the KVM subsystem on the arm64 platform does
        not properly handle the KVM_SET_ON_REG ioctl. An attacker who can
        create KVM based virtual machines can take advantage of this flaw
        for denial of service (hypervisor panic) or privilege escalation
        (arbitrarily redirect the hypervisor flow of control with full
        register control).
    
    For the stable distribution (stretch), these problems have been fixed in
    version 4.9.110-3+deb9u6.
    
    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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