CVE-2026-109448

A flaw was found in postgresql-odbc. An integer wraparound vulnerability in the SQLBindParameter function allows an attacker who controls the number of parameters bound in a database query to corrupt heap memory. By binding an excessively large number of parameters on a single statement, an attacker can trigger out-of-bounds memory writes, leading to an application crash and a Denial of Service (DoS).

This vulnerability is rated as Moderate severity because successful exploitation requires an application utilizing the driver to bind more than 32,767 query parameters supplied by untrusted user input, which represents an atypical workload. Although the arithmetic wraparound corrupts process memory and causes the client application to crash, the impact is confined to client-side denial of service and does not compromise the underlying PostgreSQL database server. Deployments where client applications enforce input bounds or avoid constructing unbounded parameter lists are not exposed to this flaw.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.