Xen 4.0 through 4.3.x, when using AVX or LWP capable CPUs, does not
properly clear previous data from registers when using an XSAVE or
XRSTOR to extend the state components of a saved or restored vCPU
after touching other restored extended registers, which allows local
guest OSes to obtain sensitive information by reading the registers.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20130925 Xen Security Advisory 62 (CVE-2013-1442) - Information leak on AVX and/or LWP capable CPUs
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