Bug 2572562 (CVE-2026-116328)

Summary: CVE-2026-116328 postgresql: postgresql: Arbitrary code execution via integer wraparound in memory contexts
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in PostgreSQL. An integer wraparound vulnerability in memory context management allows an authenticated database user to execute arbitrary code with the privileges of the operating system user running the database. By freeing a memory allocation exceeding one gigabyte (1 GB), the system improperly reuses memory blocks due to an offset calculation error, resulting in memory corruption.
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Description OSIDB Bzimport 2026-11-12 14:33:38 UTC 
Integer wraparound in PostgreSQL generation memory contexts allows a database user to execute arbitrary code as the operating system user running the database, via freeing an allocation larger than 1 GB and causing its block to be reused for smaller chunks whose back-pointer offset cannot represent that position.  Within major versions 16-18, minor versions before PostgreSQL 18.7, 17.12, and 16.16 are affected.  Versions before PostgreSQL 16 are unaffected.