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MEDIUM: 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes. This results in a segmentation fault for the application using libpq. Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.
Problem types
Integer Overflow or Wraparound
Credits
The PostgreSQL project thanks Aleksey Solovev (Positive Technologies) for reporting this problem.
References
www.postgresql.org/support/security/CVE-2025-12818/
