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CVE-2016-3158

Published: Apr 13, 2016

Modified: Aug 5, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

x_refsource_CONFIRM

FEDORA-2016-5f196e4e4a

vendor-advisory

x_refsource_FEDORA

vdb-entry

x_refsource_BID

http://xenbits.xen.org/xsa/xsa172-4.3.patch

x_refsource_CONFIRM

http://xenbits.xen.org/xsa/advisory-172.html

x_refsource_CONFIRM

FEDORA-2016-e5432ca977

vendor-advisory

x_refsource_FEDORA

http://xenbits.xen.org/xsa/xsa172.patch

x_refsource_CONFIRM

vdb-entry

x_refsource_SECTRACK

http://support.citrix.com/article/CTX209443

x_refsource_CONFIRM

vendor-advisory

x_refsource_DEBIAN

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