nova/releasenotes/notes/bug-1732976-doubled-allocat...

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security:
- |
`OSSA-2017-006`_: Nova FilterScheduler doubles resource allocations during
rebuild with new image (CVE-2017-17051)
By repeatedly rebuilding an instance with new images, an authenticated user
may consume untracked resources on a hypervisor host leading to a denial of
service. This regression was introduced with the fix for `OSSA-2017-005`_
(CVE-2017-16239), however, only Nova stable/pike or later deployments with
that fix applied and relying on the default FilterScheduler are affected.
The fix is in the `nova-api` and `nova-scheduler` services.
.. note:: The fix for errata in `OSSA-2017-005`_ (CVE-2017-16239) will
need to be applied in addition to this fix.
.. _OSSA-2017-006: https://security.openstack.org/ossa/OSSA-2017-006.html