CVE-2016-3158

The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows…

published April 13, 2016

CVSS
—
EPSS
0%
Percentile
33.9
In the wild
Unconfirmed
What it is

The xrstor function in arch/x86/xstate.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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00410 · 33.9th percentile
Published
2016-04-13T16:00Z
EPSS history
Timeline
  • 13 APR 16:00Z
    The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows…
    cvelistv5