fix(Router): localize p_encrypted to prevent recursive-overwrite leak

src/mesh/Router.cpp

@@ -736,9 +736,13 @@ void Router::handleReceived(meshtastic_MeshPacket *p, RxSource src)
     // Also, we should set the time from the ISR and it should have msec level resolution
     p->rx_time = getValidTime(RTCQualityFromNet); // store the arrival timestamp for the phone
 
-    // Store a copy of encrypted packet for MQTT
+    // Store a copy of the encrypted packet for MQTT.
+    // Local, not a class member: handleReceived re-enters itself when a module
+    // reply broadcast goes through MeshService::sendToMesh -> Router::sendLocal,
+    // and a member would be silently overwritten without release on the inner
+    // call. Each invocation now owns its own copy (issue #9632, #10101, #8729).
     DEBUG_HEAP_BEFORE;
-    p_encrypted = packetPool.allocCopy(*p);
+    meshtastic_MeshPacket *p_encrypted = packetPool.allocCopy(*p);
     DEBUG_HEAP_AFTER("Router::handleReceived", p_encrypted);
 
     // Take those raw bytes and convert them back into a well structured protobuf we can understand
@@ -832,8 +836,7 @@ void Router::handleReceived(meshtastic_MeshPacket *p, RxSource src)
 #endif
     }
 
-    packetPool.release(p_encrypted); // Release the encrypted packet
-    p_encrypted = nullptr;
+    packetPool.release(p_encrypted); // Release the encrypted packet (release() handles nullptr)
 }
 
 void Router::perhapsHandleReceived(meshtastic_MeshPacket *p)

src/mesh/Router.h

@@ -92,9 +92,6 @@ class Router : protected concurrency::OSThread, protected PacketHistory
         before us */
     uint32_t rxDupe = 0, txRelayCanceled = 0;
 
-    // pointer to the encrypted packet
-    meshtastic_MeshPacket *p_encrypted = nullptr;
-
   protected:
     friend class RoutingModule;