Bug 2572529 (CVE-2026-116323)

Summary: CVE-2026-116323 postgresql: postgresql: Arbitrary code execution via use-after-free in PL/Tcl
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. A use-after-free vulnerability in the PL/Tcl procedural language extension occurs when evaluating domain CHECK constraints that re-enter the Tcl interpreter. An authenticated database user with privileges to create objects can exploit this flaw to execute arbitrary code as the operating system user running the database service.
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Description OSIDB Bzimport 2026-11-12 14:31:29 UTC
Use after free in PostgreSQL pltcl allows an object creator to execute arbitrary code as the operating system user running the database, via a domain CHECK that re-enters the Tcl interpreter and frees or changes a string still used by the outer result conversion.  Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.