CVE-2024-0519: The CVE That Got Away
An in-the-wild Chrome renderer 0-day patched January 2024 — no public root cause analysis for two years. This RCA traces it to a TOCTOU race in V8's JIT constant-folding pipeline → type confusion (`PropertyConstness::kConst` invariant violation) → OOB read/write. Invisible to JavaScript probes; only reproduces with a C++ harness.