diff --git a/lib/valueflow.cpp b/lib/valueflow.cpp
index 85f90085416..ba0850f9bdc 100644
--- a/lib/valueflow.cpp
+++ b/lib/valueflow.cpp
@@ -5329,7 +5329,7 @@ static void valueFlowForwardConst(Token* start,
                                   const Settings* const settings,
                                   int /*unused*/ = 0)
 {
-    for (Token* tok = start; tok != end; tok = tok->next()) {
+    for (Token* tok = start; precedes(tok, end); tok = tok->next()) {
         if (tok->varId() == var->declarationId()) {
             for (const ValueFlow::Value& value : values)
                 setTokenValue(tok, value, settings);
diff --git a/test/testvalueflow.cpp b/test/testvalueflow.cpp
index 5b2cb58e47b..7106b1301af 100644
--- a/test/testvalueflow.cpp
+++ b/test/testvalueflow.cpp
@@ -6812,6 +6812,14 @@ class TestValueFlow : public TestFixture {
                "    std::shared_ptr<B> m;\n"
                "};\n";
         valueOfTok(code, "r");
+
+        code = "void f(int a, int b) {\n" // #11423
+               "    auto g = [](int& a, const int b) -> void {};\n"
+               "    auto h = [&a, &b]() {\n"
+               "        std::swap(a, b);\n"
+               "    };\n"
+               "}\n";
+        valueOfTok(code, "b");
     }
 
     void valueFlowHang() {