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CVE-2026-72711: Lean Kernel Missing Fvar Check Opaquecve-2026-72711-lean-kernel-missing-fvar-check-opaque

Missing `check_no_metavar_no_fvar` check on declaration value before type checking. Opaque or definition declarations containing unvalidated free variables or metavariables can bypass kernel soundness checks via type checker cache lookup.

by Provallyupdated 2026-09-02Apache-2.0
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