CVE-2016-3158
Low
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.
SeverityLow
CVSS3.8
Exploit probability—
Product
Xen
PublishedApr 13, 2016
First seenApr 13, 2016
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xen xen | v ≤ 4.4.0 | — |
| fedoraproject fedora | 22, 23 | — |
| oracle vm_server | 3.3, 3.4 | — |
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