Bug 2572580 (CVE-2026-120139)

Summary: CVE-2026-120139 postgresql: postgresql: Arbitrary code execution via integer wraparound in tuple-size calculations
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in PostgreSQL. An integer wraparound (an arithmetic calculation exceeding numerical limits) occurs during in-memory tuple-size calculations when handling oversized data. An authenticated database user can exploit this flaw to execute arbitrary code with the privileges of the operating system user running the database service.
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Description OSIDB Bzimport 2026-11-12 14:34:43 UTC
Integer wraparound in PostgreSQL in-memory tuple-size calculations allows a database user to execute arbitrary code as the operating system user running the database, via oversized tuple data.  Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.