Bug 2549850 (CVE-2026-109448)

Summary: CVE-2026-109448 postgresql-odbc: postgresql-odbc: Denial of Service via integer wraparound in SQLBindParameter
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2550369    
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Description OSIDB Bzimport 2026-10-12 18:02:09 UTC 
Integer wraparound in psqlODBC SQLBindParameter allows an application, or an attacker who controls how many parameters the application binds on one statement, to corrupt heap memory. psqlODBC stores the binding count in a signed 16-bit field. Binding parameter number 32768 wraps that count to -32768. Binding parameter 32769 then writes about 2.5 MB of zeros starting 1.25 MB before the binding array, which crashes the application or leaves it running on a corrupted heap. Applications that build parameter lists from untrusted input, such as an IN (?, ?, ...) list, are exposed. Versions before psqlODBC 18.00.0005 are affected.