diff --git a/src/plugins/intel_cpu/src/nodes/bin_conv.cpp b/src/plugins/intel_cpu/src/nodes/bin_conv.cpp
index 977c178c24d..d6518e49022 100644
--- a/src/plugins/intel_cpu/src/nodes/bin_conv.cpp
+++ b/src/plugins/intel_cpu/src/nodes/bin_conv.cpp
@@ -636,6 +636,8 @@ private:
         if (jcp_.with_binarization) {
             int binarization_idx = p.find(primitive_kind::binarization);
 
+            IE_ASSERT(binarization_idx >= 0) << "postops don't contain binarization";
+
             pop(reg_oc_off);
 
             mov(reg_b_weights, reinterpret_cast<size_t>(p.entry_[binarization_idx].binarization.weights_data));
diff --git a/src/plugins/intel_cpu/src/nodes/kernels/x64/registers_pool.hpp b/src/plugins/intel_cpu/src/nodes/kernels/x64/registers_pool.hpp
index b6e429e3fbc..1c1b6218b87 100644
--- a/src/plugins/intel_cpu/src/nodes/kernels/x64/registers_pool.hpp
+++ b/src/plugins/intel_cpu/src/nodes/kernels/x64/registers_pool.hpp
@@ -124,7 +124,7 @@ protected:
         PhysicalSet(int size) : isFreeIndexVector(size, true) {}
 
         void setAsUsed(size_t regIdx) {
-            if (regIdx >= isFreeIndexVector.size() || regIdx < 0) {
+            if (regIdx >= isFreeIndexVector.size()) {
                 IE_THROW() << "regIdx is out of bounds in RegistersPool::PhysicalSet::setAsUsed()";
             }
             if (!isFreeIndexVector[regIdx]) {
@@ -134,7 +134,7 @@ protected:
         }
 
         void setAsUnused(size_t regIdx) {
-            if (regIdx >= isFreeIndexVector.size() || regIdx < 0) {
+            if (regIdx >= isFreeIndexVector.size()) {
                 IE_THROW() << "regIdx is out of bounds in RegistersPool::PhysicalSet::setAsUsed()";
             }
             if (isFreeIndexVector[regIdx]) {
@@ -147,7 +147,7 @@ protected:
             if (requestedIdx == static_cast<size_t>(anyIdx)) {
                 return getFirstFreeIndex();
             } else {
-                if (requestedIdx >= isFreeIndexVector.size() || requestedIdx < 0) {
+                if (requestedIdx >= isFreeIndexVector.size()) {
                     IE_THROW() << "requestedIdx is out of bounds in RegistersPool::PhysicalSet::getUnused()";
                 }
                 if (!isFreeIndexVector[requestedIdx]) {
diff --git a/src/plugins/intel_cpu/src/nodes/mvn.cpp b/src/plugins/intel_cpu/src/nodes/mvn.cpp
index 049c7658d1b..b8f25e79ac4 100644
--- a/src/plugins/intel_cpu/src/nodes/mvn.cpp
+++ b/src/plugins/intel_cpu/src/nodes/mvn.cpp
@@ -1159,6 +1159,8 @@ MVN::MVN(const std::shared_ptr<ngraph::Node>& op, const GraphContext::CPtr conte
         mvnAttrs.normalizeVariance_ = mvnOp->get_normalize_variance();
         mvnAttrs.epsValue_ = mvnOp->get_eps();
         mvnAttrs.initAcrossChannels_ = mvnOp->get_across_channels();
+    } else {
+        IE_THROW(NotImplemented) << "Node is not an instance of MVN from the operation set v0 or v6";
     }
     mvnAttrs.execAcrossChannels_ = mvnAttrs.initAcrossChannels_;
 }