CVE-2016-3159

LowCVSS 3.8/10Last modified Jun 17, 2026

Description

The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

Metrics

CVSS 3.0 3.8/10CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Weakness enumeration

CWE-200 CWE-284

Affected software

No affected versions have been published.

Timeline

Published: Apr 13, 2016
Last modified: Jun 17, 2026
NVD status: Modified

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