6d6348f032
The SQL functions for the restore of attribute and expression statistics accept "most_common_vals" and "most_common_freqs" as independent arrays. The planner assumes these have the same number of elements, but it was possible to insert in the catalogs data that would cause an over-read when the catalog data is loaded in the planner. There were two holes in the stats restore logic: - Both arrays should match in size. - The input array must be one-dimensional, and it should match with what is delivered by pg_dump when scanning the pg_stats catalogs. The multivariate extended statistics MCV path (import_mcv) already validated these inputs via check_mcvlist_array(), and is not affected. These problems exist in v18 and newer versions for the restore of attribute statistics. These problems affect only HEAD for the restore of the expression statistics. Reported-by: Jeroen Gui <jeroen.gui1@proton.me> Author: Michael Paquier <michael@paquier.xyz> Reviewed-by: Amit Langote <amitlangote09@gmail.com> Reviewed-by: John Naylor <johncnaylorls@gmail.com> Security: CVE-2026-6575 Backpatch-through: 18 |
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PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.