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FreeBSD: VID-45CA25B5-BA4D-11E6-AE1B-002590263BF5 (CVE-2016-7092): xen-kernel -- x86: Disallow L3 recursive pagetable for 32-bit PV guests

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FreeBSD: VID-45CA25B5-BA4D-11E6-AE1B-002590263BF5 (CVE-2016-7092): xen-kernel -- x86: Disallow L3 recursive pagetable for 32-bit PV guests

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
09/08/2016
Created
07/25/2018
Added
12/04/2016
Modified
05/07/2019

Description

The get_page_from_l3e function in arch/x86/mm.c in Xen allows local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables.

Solution(s)

  • freebsd-upgrade-package-xen-kernel

References

  • DLA-614-1
  • DSA-3663
  • CVE-2016-7092

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