diff --git a/iceoryx_binding_c/test/moduletests/test_publisher.cpp b/iceoryx_binding_c/test/moduletests/test_publisher.cpp
index c4bf4d5dd5..db28439415 100644
--- a/iceoryx_binding_c/test/moduletests/test_publisher.cpp
+++ b/iceoryx_binding_c/test/moduletests/test_publisher.cpp
@@ -361,7 +361,14 @@ TEST(iox_pub_options_test, publisherOptionsInitializationCheckReturnsTrueAfterDe
 TEST(iox_pub_options_test, publisherOptionsInitializationCheckReturnsFalseWithoutDefaultInit)
 {
     iox_pub_options_t sut;
+#if (defined(__GNUC__) && __GNUC__ >= 7 && !defined(__clang__))
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
     EXPECT_FALSE(iox_pub_options_is_initialized(&sut));
+#if (defined(__GNUC__) && __GNUC__ >= 7 && !defined(__clang__))
+#pragma GCC diagnostic pop
+#endif
 }
 
 TEST(iox_pub_options_test, publisherOptionInitializationWithNullptrDoesNotCrash)
diff --git a/iceoryx_binding_c/test/moduletests/test_subscriber.cpp b/iceoryx_binding_c/test/moduletests/test_subscriber.cpp
index 2f311b0cbd..a9b72e6d5c 100644
--- a/iceoryx_binding_c/test/moduletests/test_subscriber.cpp
+++ b/iceoryx_binding_c/test/moduletests/test_subscriber.cpp
@@ -433,7 +433,14 @@ TEST(iox_sub_options_test, subscriberOptionsInitializationCheckReturnsTrueAfterD
 TEST(iox_sub_options_test, subscriberOptionsInitializationCheckReturnsFalseWithoutDefaultInit)
 {
     iox_sub_options_t sut;
+#if (defined(__GNUC__) && __GNUC__ >= 7 && !defined(__clang__))
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
     EXPECT_FALSE(iox_sub_options_is_initialized(&sut));
+#if (defined(__GNUC__) && __GNUC__ >= 7 && !defined(__clang__))
+#pragma GCC diagnostic pop
+#endif
 }
 
 TEST(iox_sub_options_test, subscriberOptionInitializationWithNullptrDoesNotCrash)
diff --git a/iceoryx_posh/source/version/version_info.cpp b/iceoryx_posh/source/version/version_info.cpp
index f4f005c250..52af4d61f6 100644
--- a/iceoryx_posh/source/version/version_info.cpp
+++ b/iceoryx_posh/source/version/version_info.cpp
@@ -1,4 +1,5 @@
 // Copyright (c) 2020 by Robert Bosch GmbH. All rights reserved.
+// Copyright (c) 2021 by Apex.AI Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -50,8 +51,8 @@ VersionInfo::VersionInfo(const cxx::Serialization& serial) noexcept
 /// @brief Serialization of the VersionInfo.
 VersionInfo::operator cxx::Serialization() const noexcept
 {
-    SerializationString_t tmp_m_buildDateString(cxx::TruncateToCapacity, m_buildDateString.c_str());
-    SerializationString_t tmp_commitIdString(cxx::TruncateToCapacity, m_commitIdString.c_str());
+    SerializationString_t tmp_m_buildDateString = m_buildDateString;
+    SerializationString_t tmp_commitIdString = m_commitIdString;
     return cxx::Serialization::create(
         m_versionMajor, m_versionMinor, m_versionPatch, m_versionTweak, tmp_m_buildDateString, tmp_commitIdString);
 }
diff --git a/iceoryx_utils/include/iceoryx_utils/internal/cxx/string.inl b/iceoryx_utils/include/iceoryx_utils/internal/cxx/string.inl
index 9bdf141a8b..a48e523b56 100755
--- a/iceoryx_utils/include/iceoryx_utils/internal/cxx/string.inl
+++ b/iceoryx_utils/include/iceoryx_utils/internal/cxx/string.inl
@@ -97,7 +97,7 @@ inline string<Capacity>::string(const char (&other)[N]) noexcept
 
 template <uint64_t Capacity>
 inline string<Capacity>::string(TruncateToCapacity_t, const char* const other) noexcept
-    : string(TruncateToCapacity, other, strnlen(other, Capacity + 1U))
+    : string(TruncateToCapacity, other, strnlen(other, Capacity))
 {
 }
 
@@ -143,7 +143,7 @@ inline string<Capacity>& string<Capacity>::operator=(const char (&rhs)[N]) noexc
         return *this;
     }
 
-    m_rawstringSize = strnlen(rhs, Capacity);
+    m_rawstringSize = std::min(Capacity, static_cast<uint64_t>(strnlen(rhs, N)));
     std::memcpy(&(m_rawstring[0]), rhs, m_rawstringSize);
     m_rawstring[m_rawstringSize] = '\0';
 
@@ -465,14 +465,18 @@ inline typename std::enable_if<internal::IsCharArray<T>::value || internal::IsCx
 string<Capacity>::unsafe_append(const T& t) noexcept
 {
     uint64_t tSize = internal::GetSize<T>::call(t);
-    if (Capacity < (m_rawstringSize + tSize))
+    const char* tData = internal::GetData<T>::call(t);
+    uint64_t clampedTSize = std::min(Capacity - m_rawstringSize, tSize);
+
+    if (tSize > clampedTSize)
     {
         std::cerr << "Appending failed because the sum of sizes exceeds this' capacity." << std::endl;
         return false;
     }
-    std::memcpy(&(m_rawstring[0]) + m_rawstringSize, internal::GetData<T>::call(t), tSize);
-    m_rawstring[m_rawstringSize + tSize] = '\0';
-    m_rawstringSize += tSize;
+
+    std::memcpy(&(m_rawstring[m_rawstringSize]), tData, clampedTSize);
+    m_rawstringSize += clampedTSize;
+    m_rawstring[m_rawstringSize] = '\0';
     return true;
 }
 
@@ -484,20 +488,17 @@ inline
 {
     uint64_t tSize = internal::GetSize<T>::call(t);
     const char* tData = internal::GetData<T>::call(t);
-    if (Capacity < (m_rawstringSize + tSize))
+    uint64_t clampedTSize = std::min(Capacity - m_rawstringSize, tSize);
+
+    std::memcpy(&(m_rawstring[m_rawstringSize]), tData, clampedTSize);
+    if (tSize > clampedTSize)
     {
         std::cerr << "The last " << tSize - Capacity + m_rawstringSize << " characters of " << tData
                   << " are truncated, because the length is larger than the capacity." << std::endl;
-        std::memcpy(&(m_rawstring[0]) + m_rawstringSize, tData, Capacity - m_rawstringSize);
-        m_rawstring[Capacity] = '\0';
-        m_rawstringSize = Capacity;
-    }
-    else
-    {
-        std::memcpy(&(m_rawstring[0]) + m_rawstringSize, tData, tSize);
-        m_rawstring[m_rawstringSize + tSize] = '\0';
-        m_rawstringSize += tSize;
     }
+
+    m_rawstringSize += clampedTSize;
+    m_rawstring[m_rawstringSize] = '\0';
     return *this;
 }
 
diff --git a/iceoryx_utils/test/moduletests/test_cxx_string.cpp b/iceoryx_utils/test/moduletests/test_cxx_string.cpp
index d1ec6b4ced..03a7dcbf39 100644
--- a/iceoryx_utils/test/moduletests/test_cxx_string.cpp
+++ b/iceoryx_utils/test/moduletests/test_cxx_string.cpp
@@ -1,4 +1,5 @@
 // Copyright (c) 2019 by Robert Bosch GmbH. All rights reserved.
+// Copyright (c) 2021 by Apex.AI Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -251,7 +252,8 @@ TYPED_TEST(stringTyped_test, UnsafeCharToStringConvConstrWithSizeCapaResultsInSi
 {
     using MyString = typename TestFixture::stringType;
     constexpr auto STRINGCAP = MyString().capacity();
-    char testChar[STRINGCAP];
+    // increase capacity by one to circumvent gcc -Werror=array-bounds
+    char testChar[STRINGCAP + 1];
     for (uint64_t i = 0U; i < STRINGCAP - 1U; i++)
     {
         testChar[i] = 'M';