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When converting multibyte to pg_wchar, the UTF-8 implementation would silently ignore an incomplete final character, while the other implementations would cast a single byte to pg_wchar, and then repeat for the remaining byte sequence. While it didn't overrun the buffer, it was surely garbage output. Make all encodings behave like the UTF-8 implementation. A later change for master only will convert this to an error, but we choose not to back-patch that behavior change on the off-chance that someone is relying on the existing UTF-8 behavior. Security: CVE-2026-2006 Backpatch-through: 14 Author: Thomas Munro <thomas.munro@gmail.com> Reported-by: Noah Misch <noah@leadboat.com> Reviewed-by: Noah Misch <noah@leadboat.com> Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.