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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…

Low3.8EPSS 0.41%
Published
Updated
Reserved
Assigned by
mitre

Description

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.

Scores

CVSS scores of CVE-2016-3158, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0Low3.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
EPSS (exploitation in 30 days)
0.41% · top 65% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.8.

Weakness

Affected products

  • n/a

    • affected n/a

References (10)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .