diff --git a/modules/flann/include/opencv2/flann/lsh_table.h b/modules/flann/include/opencv2/flann/lsh_table.h
index 126fb2a992..a30642a480 100644
--- a/modules/flann/include/opencv2/flann/lsh_table.h
+++ b/modules/flann/include/opencv2/flann/lsh_table.h
@@ -261,6 +261,16 @@ private:
      */
     void initialize(size_t key_size)
     {
+        const size_t key_size_lower_bound = 1;
+        //a value (size_t(1) << key_size) must fit the size_t type so key_size has to be strictly less than size of size_t
+        const size_t key_size_upper_bound = std::min(sizeof(BucketKey) * CHAR_BIT + 1, sizeof(size_t) * CHAR_BIT);
+        if (key_size < key_size_lower_bound || key_size >= key_size_upper_bound)
+        {
+            std::stringstream errorMessage;
+            errorMessage << "Invalid key_size (=" << key_size << "). Valid values for your system are " << key_size_lower_bound << " <= key_size < " << key_size_upper_bound << ".";
+            CV_Error(CV_StsBadArg, errorMessage.str());
+        }
+
         speed_level_ = kHash;
         key_size_ = (unsigned)key_size;
     }
@@ -273,10 +283,10 @@ private:
         if (speed_level_ == kArray) return;
 
         // Use an array if it will be more than half full
-        if (buckets_space_.size() > (unsigned int)((1 << key_size_) / 2)) {
+        if (buckets_space_.size() > ((size_t(1) << key_size_) / 2)) {
             speed_level_ = kArray;
             // Fill the array version of it
-            buckets_speed_.resize(1 << key_size_);
+            buckets_speed_.resize(size_t(1) << key_size_);
             for (BucketsSpace::const_iterator key_bucket = buckets_space_.begin(); key_bucket != buckets_space_.end(); ++key_bucket) buckets_speed_[key_bucket->first] = key_bucket->second;
 
             // Empty the hash table
@@ -287,9 +297,9 @@ private:
         // If the bitset is going to use less than 10% of the RAM of the hash map (at least 1 size_t for the key and two
         // for the vector) or less than 512MB (key_size_ <= 30)
         if (((std::max(buckets_space_.size(), buckets_speed_.size()) * CHAR_BIT * 3 * sizeof(BucketKey)) / 10
-             >= size_t(1 << key_size_)) || (key_size_ <= 32)) {
+             >= (size_t(1) << key_size_)) || (key_size_ <= 32)) {
             speed_level_ = kBitsetHash;
-            key_bitset_.resize(1 << key_size_);
+            key_bitset_.resize(size_t(1) << key_size_);
             key_bitset_.reset();
             // Try with the BucketsSpace
             for (BucketsSpace::const_iterator key_bucket = buckets_space_.begin(); key_bucket != buckets_space_.end(); ++key_bucket) key_bitset_.set(key_bucket->first);
diff --git a/modules/flann/test/test_lshtable_badarg.cpp b/modules/flann/test/test_lshtable_badarg.cpp
new file mode 100644
index 0000000000..9e42335c2c
--- /dev/null
+++ b/modules/flann/test/test_lshtable_badarg.cpp
@@ -0,0 +1,91 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                        Intel License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000, Intel Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of Intel Corporation may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "test_precomp.hpp"
+
+using namespace cv;
+
+class CV_LshTableBadArgTest : public cvtest::BadArgTest
+{
+protected:
+    void run(int);
+    void run_func(void) {};
+
+    struct Caller
+    {
+        int table_number, key_size, multi_probe_level;
+        Mat features;
+
+        void operator()() const
+        {
+            flann::LshIndexParams indexParams(table_number, key_size, multi_probe_level);
+            flann::Index lsh(features, indexParams);
+        }
+    };
+};
+
+void CV_LshTableBadArgTest::run( int /* start_from */ )
+{
+    RNG &rng = ts->get_rng();
+
+    Caller caller;
+    Size featuresSize = cvtest::randomSize(rng, 10.0);
+    caller.features = cvtest::randomMat(rng, featuresSize, CV_8UC1, 0, 255, false);
+    caller.table_number = 12;
+    caller.multi_probe_level = 2;
+
+    int errors = 0;
+    caller.key_size = 0;
+    errors += run_test_case(CV_StsBadArg, "key_size is zero", caller);
+
+    caller.key_size = static_cast<int>(sizeof(size_t) * CHAR_BIT);
+    errors += run_test_case(CV_StsBadArg, "key_size is too big", caller);
+
+    caller.key_size += cvtest::randInt(rng) % 100;
+    errors += run_test_case(CV_StsBadArg, "key_size is too big", caller);
+
+    if (errors != 0)
+        ts->set_failed_test_info(cvtest::TS::FAIL_MISMATCH);
+    else
+        ts->set_failed_test_info(cvtest::TS::OK);
+}
+
+TEST(Flann_LshTable, badarg) { CV_LshTableBadArgTest test; test.safe_run(); }
diff --git a/modules/flann/test/test_main.cpp b/modules/flann/test/test_main.cpp
new file mode 100644
index 0000000000..6b24993447
--- /dev/null
+++ b/modules/flann/test/test_main.cpp
@@ -0,0 +1,3 @@
+#include "test_precomp.hpp"
+
+CV_TEST_MAIN("cv")
diff --git a/modules/flann/test/test_precomp.cpp b/modules/flann/test/test_precomp.cpp
new file mode 100644
index 0000000000..5956e13e3e
--- /dev/null
+++ b/modules/flann/test/test_precomp.cpp
@@ -0,0 +1 @@
+#include "test_precomp.hpp"
diff --git a/modules/flann/test/test_precomp.hpp b/modules/flann/test/test_precomp.hpp
new file mode 100644
index 0000000000..809a97e702
--- /dev/null
+++ b/modules/flann/test/test_precomp.hpp
@@ -0,0 +1,17 @@
+#ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wmissing-declarations"
+#  if defined __clang__ || defined __APPLE__
+#    pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#    pragma GCC diagnostic ignored "-Wextra"
+#  endif
+#endif
+
+#ifndef __OPENCV_TEST_PRECOMP_HPP__
+#define __OPENCV_TEST_PRECOMP_HPP__
+
+#include "opencv2/ts/ts.hpp"
+#include "opencv2/core/core.hpp"
+#include "opencv2/flann/flann.hpp"
+#include <iostream>
+
+#endif