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The special case here for estimating conditions involving a ctid column failed to check that the RHS constant is of type tid. While that'd always be true for the built-in operators that reference this selectivity estimator, a maliciously constructed operator could provide a user-controlled Datum value that would get interpreted as an ItemPointer pointer. That at least risks SIGSEGV, and perhaps with a bit of sweat it could be used for server memory disclosure. Reported-by: Hcamael <baiyjrh@gmail.com> Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Noah Misch <noah@leadboat.com> Backpatch-through: 14 Security: CVE-2026-14668
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/.