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FreeBSD: VID-80A897A2-C1A6-11E6-AE1B-002590263BF5 (CVE-2016-9932): xen-kernel -- x86 CMPXCHG8B emulation fails to ignore operand size override

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FreeBSD: VID-80A897A2-C1A6-11E6-AE1B-002590263BF5 (CVE-2016-9932): xen-kernel -- x86 CMPXCHG8B emulation fails to ignore operand size override

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
12/13/2016
Created
07/25/2018
Added
12/14/2016
Modified
05/07/2019

Description

CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.

Solution(s)

  • freebsd-upgrade-package-xen-kernel

References

  • DLA-964-1
  • DSA-3847
  • CVE-2016-9932

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