Errata overview
Errata ID 69
Date 2018-05-16
Source package postgresql-9.6
Fixed in version 9.6.7-0+deb9u1
This update addresses the following issues:
* Ensure that all temporary files made by pg_upgrade are non-world-readable
* Change the behavior of contrib/cube's cube ~> int operator to make it
  compatible with KNN search. The meaning of the second argument (the
  dimension selector) has been changed to make it predictable which value is
  selected even when dealing with cubes of varying dimensionalities. This is
  an incompatible change, but since the point of the operator was to be used
  in KNN searches, it seems rather useless as-is. After installing this
  update, any expression indexes or materialized views using this operator
  will need to be reindexed/refreshed.
Additional notes
CVE ID CVE-2018-1053
UCS Bug number #46620