Bug 2572542 (CVE-2026-120143)

Summary: CVE-2026-120143 postgresql: postgresql: Arbitrary code execution via use-after-free in trigger functions
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. A use-after-free vulnerability in trigger functions allows an authenticated database user with object creation privileges to execute arbitrary code as the operating system user running the database. By defining a cursor over a transition table within a trigger function, an attacker can access previously freed memory, resulting in memory corruption and full compromise of the database service process.
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Description OSIDB Bzimport 2026-11-12 14:32:18 UTC 
Use after free in PostgreSQL trigger functions allows an object creator to execute arbitrary code as the operating system user running the database, via a cursor over a transition table.  Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.