PostgreSQL: Denial of Service via Buffer Over-read in GB18030 Encoding Validation

In PostgreSQL versions before 17.5, 16.9, 15.13, 14.18 and 13.21 a medium severity vulnerability CVE-2025-4207 was detected. This vulnerability allows a database input provider to trigger a temporary denial of service by exploiting a buffer over-read in GB18030 encoding validation, potentially causing process termination on affected platforms and impacting both the database server and libpq. To address this issue, users should upgrade PostgreSQL to versions 17.5, 16.9, 15.13, 14.18 or 13.21. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-4207.