Using a purpose-crafted insert to a partitioned table, an attacker can read arbitrary bytes of server memory. In the default configuration, any user can create a partitioned table suitable for this attack. (Exploit prerequisites are the same as for CVE-2018-1052.)
Acknowledgments: Name: Noah Misch, the PostgreSQL Project
This vulnerability only affected PostgreSQL 11.x prior to 11.3
Created postgresql tracking bugs for this issue: Affects: fedora-all [bug 1709183]
External References: https://www.postgresql.org/about/news/1939/