diff --git a/modules/core/src/opengl.cpp b/modules/core/src/opengl.cpp
index 83be34f147..b7a85a61a4 100644
--- a/modules/core/src/opengl.cpp
+++ b/modules/core/src/opengl.cpp
@@ -1682,27 +1682,12 @@ Context& initializeContextFromGL()
 
                 if(extensionSize > 0)
                 {
-                    char* extensions = nullptr;
-
-                    try {
-                        extensions = new char[extensionSize];
-
-                        status = clGetDeviceInfo(devices[j], CL_DEVICE_EXTENSIONS, extensionSize, extensions, &extensionSize);
-                        if (status != CL_SUCCESS)
-                            continue;
-                    } catch(...) {
-                        CV_Error(cv::Error::OpenCLInitError, "OpenCL: Exception thrown during device extensions gathering");
-                    }
-
-                    std::string devString;
-
-                    if(extensions != nullptr) {
-                        devString = extensions;
-                        delete[] extensions;
-                    }
-                    else {
-                        CV_Error(cv::Error::OpenCLInitError, "OpenCL: Unexpected error during device extensions gathering");
-                    }
+                    std::string devString(extensionSize, '\0');
+                    status = clGetDeviceInfo(devices[j], CL_DEVICE_EXTENSIONS, devString.size(), &devString[0], &extensionSize);
+                    if (status != CL_SUCCESS)
+                        continue;
+                    if (extensionSize > 0 && devString.size() >= extensionSize)
+                        devString.resize(extensionSize - 1);
 
                     size_t oldPos = 0;
                     size_t spacePos = devString.find(' ', oldPos); // extensions string is space delimited