Update VULNERABILITY_REPORT.md

VULNERABILITY_REPORT.md

@@ -97,21 +97,43 @@ Should the Gigacage be bypassed or its base address leaked, this vulnerability e
 
 ## 6. Remediation Recommendations
 
-We recommend the immediate implementation of **Checked Arithmetic** in the following components:
+### 6.1 Implementation of Checked Arithmetic
 
+The root cause—an integer overflow during memory offset calculation—must be addressed by implementing checked arithmetic within the JavaScriptCore runtime. We recommend replacing standard multiplication with compiler-intrinsic overflow checks to ensure that any `byteOffset` exceeding the 32-bit boundary is caught before memory access is attempted.
+
+**Target Components:**
 - `Source/JavaScriptCore/runtime/JSArrayBufferView.cpp`
 - `Source/JavaScriptCore/runtime/JSDataView.cpp`
 
-**Proposed Fix:**  
-Utilize compiler intrinsics to detect overflows during offset calculation:
-
+**Proposed Fix (C++):**
 ```cpp
+// Utilize compiler intrinsics to detect 32-bit overflows
 size_t byteOffset;
 if (__builtin_mul_overflow(static_cast<size_t>(index), m_elementSize, &byteOffset)) {
+    return throwOverflowError(); // Prevent execution from reaching the Gigacage
+}
+
+// Ensure the end-of-range does not wrap
+size_t endOffset;
+if (__builtin_add_overflow(byteOffset, m_elementSize, &endOffset)) {
     return throwOverflowError();
 }
 ```
 
+
+### 6.2 Technical Justification from Crash Telemetry
+
+The necessity of this fix is confirmed by the provided crash logs (Incidents 50371BD6 and F8D6F487). The telemetry data reveals:
+
+- **Hardware-Level Enforcement:** The current reliance on the Gigacage (Namespace 31) results in an `EXC_GUARD` violation. While effective at preventing RCE, this is a "fail-safe" rather than a primary validation, leading to a persistent Denial of Service.
+- **Consistent Failure Point:** The identical crash frame at `0x22DB0E96C` across both MobileSafari and SafariViewService indicates the flaw is centrally located within the shared WebKit binary (`uuid: af25fa78...`).
+- **Systemic Vulnerability:** The presence of the same exception in SafariViewService confirms that the vulnerability affects all third-party applications utilizing `WKWebView` on iOS 26.2.
+
+
+### 6.3 JIT Compiler Hardening
+
+In addition to runtime checks, the WebAssembly JIT compiler must be updated to ensure that 32-bit integer arithmetic (`i32`) does not elide bounds checks when calculating effective addresses. The compiler should emit explicit check-and-branch instructions where an `i32.add` could result in a wrapped offset that bypasses standard bounds-checking logic.
+
 ---
 
 ## 7. Supporting Evidence
@@ -124,10 +146,9 @@ if (__builtin_mul_overflow(static_cast<size_t>(index), m_elementSize, &byteOffse
 
 All logs demonstrate an identical crash offset (`0xADD7476C`) and namespace 31 violation, confirming 100% reproducibility across various process roles.
 
-
+---
 # End of Report
 
----
 
 - **Primary Contact:** Joseph Goydish II