PostgreSQL 9.6.2, 9.5.6, 9.4.11, 9.3.16 and 9.2.20 released!
The PostgreSQL Global Development Group has released an update to all supported
versions of our database system, including 9.6.2, 9.5.6, 9.4.11, 9.3.16, and
9.2.20. This release includes fixes that prevent data corruption issues in
index builds and in certain write-ahead-log replay situations, which are
detailed below. It also patches over 75 other bugs reported over the last three
months.
Users should plan to apply this update at the next scheduled downtime.
Build corruption with CREATE INDEX CONCURRENTLY
There existed a race condition if CREATE INDEX CONCURRENTLY was called on a
column that had not been indexed before, then rows that were updated by
transactions running at the same time as the CREATE INDEX CONCURRENTLY command
could have been indexed incorrectly.
If you suspect this may have happened, the most reliable solution is to rebuild
affected indexes after installing this update.
This issue is present in the 9.2, 9.3, 9.4, 9.5, and 9.6 series of PostgreSQL.