diff --git a/modules/calib3d/src/usac.hpp b/modules/calib3d/src/usac.hpp
index 4fcf58762f341600ebd374189e0f782b224effac..f658e87d381718a2e19960cb967ca26c0135c4be 100644
--- a/modules/calib3d/src/usac.hpp
+++ b/modules/calib3d/src/usac.hpp
@@ -405,7 +405,9 @@ struct SPRT_history {
     double epsilon, delta, A;
     // number of samples processed by test
     int tested_samples; // k
-    SPRT_history () {
+    SPRT_history ()
+        : epsilon(0), delta(0), A(0)
+    {
         tested_samples = 0;
     }
 };
diff --git a/modules/dnn/src/dnn.cpp b/modules/dnn/src/dnn.cpp
index 797120ac47004bc861956e576c0b7c6f4fefc807..5bf769432082576046ad1500b964c7ceba162cea 100644
--- a/modules/dnn/src/dnn.cpp
+++ b/modules/dnn/src/dnn.cpp
@@ -2731,6 +2731,7 @@ struct Net::Impl : public detail::NetImplBase
                                 bool fuse_eltwise = false, fuse_activation = false;
 
                                 if (IS_DNN_OPENCL_TARGET(preferableTarget) && !nextFusabeleActivLayer.empty() &&
+                                    nextData &&
                                     (!nextData->type.compare("ReLU") ||
                                      !nextData->type.compare("ChannelsPReLU") ||
                                      !nextData->type.compare("Power")) &&
@@ -2753,7 +2754,7 @@ struct Net::Impl : public detail::NetImplBase
                                     if (currLayer->tryFuse(layer))
                                     {
                                         fuse_eltwise = true; /* eltwise was successfully fused */
-                                        if (!nextFusabeleActivLayer.empty())
+                                        if (!nextFusabeleActivLayer.empty() && nextData)
                                         {
                                             if ((!nextData->type.compare("ReLU") ||
                                                  !nextData->type.compare("ReLU6") ||
@@ -2774,6 +2775,7 @@ struct Net::Impl : public detail::NetImplBase
                                 CV_Assert(!fuse_activation || fuse_eltwise); /* cannot fuse activation without eltwise */
                                 if(fuse_eltwise && fuse_activation)
                                 {
+                                    CV_Assert(nextData);
                                     CV_Assert_N(biasLayerData->outputBlobsWrappers.size() == 1, ld.inputBlobsWrappers.size() == 1);
                                     ld.inputBlobsWrappers.push_back(biasLayerData->outputBlobsWrappers[0]);
                                     printf_(("\tfused with %s\n", nextEltwiseLayer->name.c_str()));