Uninitialized x86 FPU Stack and XMM Registers Vulnerability in Xen 4.6.x and Earlier

CVE-2015-8555 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.

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