diff --git a/Userland/Libraries/LibJS/Runtime/TypedArray.cpp b/Userland/Libraries/LibJS/Runtime/TypedArray.cpp
index dc101dc46e..7a8b63fb90 100644
--- a/Userland/Libraries/LibJS/Runtime/TypedArray.cpp
+++ b/Userland/Libraries/LibJS/Runtime/TypedArray.cpp
@@ -668,7 +668,7 @@ u32 typed_array_length_with_known_valid_bounds(TypedArrayWithBufferWitness const
 }
 
 // 10.4.5.13 IsTypedArrayOutOfBounds ( taRecord ), https://tc39.es/ecma262/#sec-istypedarrayoutofbounds
-bool is_typed_array_out_of_bounds(TypedArrayWithBufferWitness const& typed_array_record)
+bool is_typed_array_out_of_bounds_for_known_attached_array(TypedArrayWithBufferWitness const& typed_array_record)
 {
     // 1. Let O be taRecord.[[Object]].
     auto object = typed_array_record.object;
@@ -677,11 +677,7 @@ bool is_typed_array_out_of_bounds(TypedArrayWithBufferWitness const& typed_array
     auto const& buffer_byte_length = typed_array_record.cached_buffer_byte_length;
 
     // 3. Assert: IsDetachedBuffer(O.[[ViewedArrayBuffer]]) is true if and only if bufferByteLength is detached.
-    VERIFY(object->viewed_array_buffer()->is_detached() == buffer_byte_length.is_detached());
-
     // 4. If bufferByteLength is detached, return true.
-    if (buffer_byte_length.is_detached())
-        return true;
 
     // 5. Let byteOffsetStart be O.[[ByteOffset]].
     auto byte_offset_start = object->byte_offset();
@@ -728,7 +724,7 @@ bool is_valid_integer_index(TypedArrayBase const& typed_array, CanonicalIndex pr
     // NOTE: Bounds checking is not a synchronizing operation when O's backing buffer is a growable SharedArrayBuffer.
 
     // 6. If IsTypedArrayOutOfBounds(taRecord) is true, return false.
-    if (is_typed_array_out_of_bounds(typed_array_record))
+    if (is_typed_array_out_of_bounds_for_known_attached_array(typed_array_record))
         return false;
 
     // 7. Let length be TypedArrayLength(taRecord).
diff --git a/Userland/Libraries/LibJS/Runtime/TypedArray.h b/Userland/Libraries/LibJS/Runtime/TypedArray.h
index bc7f3941f8..e01c4f8990 100644
--- a/Userland/Libraries/LibJS/Runtime/TypedArray.h
+++ b/Userland/Libraries/LibJS/Runtime/TypedArray.h
@@ -110,6 +110,18 @@ inline u32 typed_array_length(TypedArrayWithBufferWitness const& typed_array_rec
     return typed_array_length_with_known_valid_bounds(typed_array_record);
 }
 
+// Fast-path version of IsTypedArrayOutOfBounds when you already know the TA is not detached.
+bool is_typed_array_out_of_bounds_for_known_attached_array(TypedArrayWithBufferWitness const&);
+
+// 10.4.5.13 IsTypedArrayOutOfBounds ( taRecord ), https://tc39.es/ecma262/#sec-istypedarrayoutofbounds
+inline bool is_typed_array_out_of_bounds(TypedArrayWithBufferWitness const& typed_array_record)
+{
+    if (typed_array_record.cached_buffer_byte_length.is_detached())
+        return true;
+
+    return is_typed_array_out_of_bounds_for_known_attached_array(typed_array_record);
+}
+
 // 10.4.5.15 TypedArrayGetElement ( O, index ), https://tc39.es/ecma262/#sec-typedarraygetelement
 template<typename T>
 inline ThrowCompletionOr<Value> typed_array_get_element(TypedArrayBase const& typed_array, CanonicalIndex property_index)