Linux kernel is vulnerable denial of service (DOS) attacks. This occurs if an L2 guest was to throw an exception which is not handled by an L1 guest. Guest OS users could cause a system crash by declining to handle an exception thrown by an L2 guest.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ef85b67385436ddc1998f45f1d6a210f935b3388
www.debian.org/security/2017/dsa-3804
www.openwall.com/lists/oss-security/2016/12/15/3
www.securityfocus.com/bid/94933
access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html
access.redhat.com/errata/RHSA-2017:1842
access.redhat.com/errata/RHSA-2017:2077
access.redhat.com/security/cve/CVE-2016-10741
access.redhat.com/security/cve/CVE-2016-9588
access.redhat.com/security/cve/CVE-2017-2584
access.redhat.com/security/cve/CVE-2017-5551
access.redhat.com/security/cve/CVE-2017-7495
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=1377840
bugzilla.redhat.com/show_bug.cgi?id=1378172
bugzilla.redhat.com/show_bug.cgi?id=1389215
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bugzilla.redhat.com/show_bug.cgi?id=1441552
bugzilla.redhat.com/show_bug.cgi?id=1452240
bugzilla.redhat.com/show_bug.cgi?id=1459056
github.com/torvalds/linux/commit/ef85b67385436ddc1998f45f1d6a210f935b3388
usn.ubuntu.com/3822-1/
usn.ubuntu.com/3822-2/