diff --git a/src/hotspot/share/cds/classListParser.cpp b/src/hotspot/share/cds/classListParser.cpp
index b2695ac2e78..f8d24295a12 100644
--- a/src/hotspot/share/cds/classListParser.cpp
+++ b/src/hotspot/share/cds/classListParser.cpp
@@ -463,7 +463,7 @@ void ClassListParser::check_class_name(const char* class_name) {
     err = "class name too long";
   } else {
     assert(Symbol::max_length() < INT_MAX && len < INT_MAX, "must be");
-    if (!UTF8::is_legal_utf8((const unsigned char*)class_name, (int)len, /*version_leq_47*/false)) {
+    if (!UTF8::is_legal_utf8((const unsigned char*)class_name, len, /*version_leq_47*/false)) {
       err = "class name is not valid UTF8";
     }
   }
@@ -849,4 +849,3 @@ void ClassListParser::parse_constant_pool_tag() {
     ClassPrelinker::preresolve_field_and_method_cp_entries(THREAD, ik, &preresolve_list);
   }
 }
-
diff --git a/src/hotspot/share/classfile/classFileParser.cpp b/src/hotspot/share/classfile/classFileParser.cpp
index a5b8604a9d5..46421ccc90c 100644
--- a/src/hotspot/share/classfile/classFileParser.cpp
+++ b/src/hotspot/share/classfile/classFileParser.cpp
@@ -4559,7 +4559,8 @@ void ClassFileParser::verify_legal_utf8(const unsigned char* buffer,
                                         int length,
                                         TRAPS) const {
   assert(_need_verify, "only called when _need_verify is true");
-  if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
+  // Note: 0 <= length < 64K, as it comes from a u2 entry in the CP.
+  if (!UTF8::is_legal_utf8(buffer, static_cast<size_t>(length), _major_version <= 47)) {
     classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", THREAD);
   }
 }
diff --git a/src/hotspot/share/classfile/systemDictionary.cpp b/src/hotspot/share/classfile/systemDictionary.cpp
index e32d124013d..b9a559cf977 100644
--- a/src/hotspot/share/classfile/systemDictionary.cpp
+++ b/src/hotspot/share/classfile/systemDictionary.cpp
@@ -285,8 +285,7 @@ Symbol* SystemDictionary::class_name_symbol(const char* name, Symbol* exception,
     return nullptr;
   }
   // Callers should ensure that the name is never an illegal UTF8 string.
-  assert(UTF8::is_legal_utf8((const unsigned char*)name,
-                             static_cast<int>(name_len), false),
+  assert(UTF8::is_legal_utf8((const unsigned char*)name, name_len, false),
          "Class name is not a valid utf8 string.");
 
   // Make a new symbol for the class name.
diff --git a/src/hotspot/share/prims/jniCheck.cpp b/src/hotspot/share/prims/jniCheck.cpp
index 87543686c3c..8c1f9f53b34 100644
--- a/src/hotspot/share/prims/jniCheck.cpp
+++ b/src/hotspot/share/prims/jniCheck.cpp
@@ -475,7 +475,7 @@ void jniCheck::validate_class_descriptor(JavaThread* thr, const char* name) {
   }
 
   // Verify that the class name given is a valid utf8 string
-  if (!UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false)) {
+  if (!UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false)) {
     char msg[JVM_MAXPATHLEN];
     jio_snprintf(msg, JVM_MAXPATHLEN, "%s%s%s", fatal_non_utf8_class_name1, name, fatal_non_utf8_class_name2);
     ReportJNIFatalError(thr, msg);
diff --git a/src/hotspot/share/prims/jvm.cpp b/src/hotspot/share/prims/jvm.cpp
index 6425f5f583f..bf9874956ba 100644
--- a/src/hotspot/share/prims/jvm.cpp
+++ b/src/hotspot/share/prims/jvm.cpp
@@ -809,7 +809,7 @@ JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
     // into the constant pool.
     return nullptr;
   }
-  assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
+  assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
 
   TempNewSymbol h_name = SymbolTable::new_symbol(name);
   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
diff --git a/src/hotspot/share/utilities/exceptions.cpp b/src/hotspot/share/utilities/exceptions.cpp
index f730b37b8ff..10405a06048 100644
--- a/src/hotspot/share/utilities/exceptions.cpp
+++ b/src/hotspot/share/utilities/exceptions.cpp
@@ -288,7 +288,7 @@ void Exceptions::fthrow(JavaThread* thread, const char* file, int line, Symbol*
   // parameter controls a check for a specific character appearing in the "name", which is only
   // allowed for classfile versions <= 47. We pass `true` so that we allow such strings as this code
   // know nothing about the actual string content.
-  assert(UTF8::is_legal_utf8((const unsigned char*)msg, (int)strlen(msg), true), "must be");
+  assert(UTF8::is_legal_utf8((const unsigned char*)msg, strlen(msg), true), "must be");
   _throw_msg(thread, file, line, h_name, msg);
 }
 
diff --git a/test/hotspot/jtreg/ProblemList.txt b/test/hotspot/jtreg/ProblemList.txt
index 1b139063b5d..6ff3dec89a1 100644
--- a/test/hotspot/jtreg/ProblemList.txt
+++ b/test/hotspot/jtreg/ProblemList.txt
@@ -118,8 +118,6 @@ runtime/ErrorHandling/TestDwarf.java#checkDecoder 8305489 linux-all
 runtime/ErrorHandling/MachCodeFramesInErrorFile.java 8313315 linux-ppc64le
 runtime/Thread/TestAlwaysPreTouchStacks.java 8335167 macosx-aarch64
 runtime/cds/appcds/customLoader/HelloCustom_JFR.java 8241075 linux-all,windows-x64
-runtime/exceptionMsgs/NoClassDefFoundError/NoClassDefFoundErrorTest.java 8339316 generic-all
-
 
 applications/jcstress/copy.java 8229852 linux-all