MitreCVELIST:CVE-2014-7155CVE-2014-7155
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
References
lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html
lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html
lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
secunia.com/advisories/61858
secunia.com/advisories/61890
security.gentoo.org/glsa/glsa-201412-42.xml
support.citrix.com/article/CTX200218
www.debian.org/security/2014/dsa-3041
www.securityfocus.com/bid/70057
www.securitytracker.com/id/1030888
xenbits.xen.org/xsa/advisory-105.html
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