Bug 2572535 (CVE-2026-116333)

Summary: CVE-2026-116333 postgresql: postgresql: Information disclosure via buffer over-read in parallel B-tree scans
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: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in PostgreSQL. An authenticated database user with permission to create database objects can trigger a buffer over-read during parallel B-tree index scans by defining a function incorrectly marked as parallel safe or stable. This issue causes participating worker processes to generate inconsistent search keys, allowing the attacker to read arbitrary server memory and resulting in sensitive information disclosure.
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Description OSIDB Bzimport 2026-11-12 14:31:49 UTC 
Buffer over-read in PostgreSQL parallel B-tree scans allows an object creator to read attacker-chosen server-memory addresses, via a function incorrectly marked PARALLEL SAFE or STABLE to make participating workers build different scan-key arrays.  Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected.  Versions before PostgreSQL 17 are unaffected.