diff --git a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
index be22f95855b9e..a6e3738e7cb0c 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
@@ -334,6 +334,11 @@ private function extractFromReflectionType(\ReflectionType $reflectionType, \Ref
         $nullable = $reflectionType->allowsNull();
 
         foreach (($reflectionType instanceof \ReflectionUnionType || $reflectionType instanceof \ReflectionIntersectionType) ? $reflectionType->getTypes() : [$reflectionType] as $type) {
+            if (!$type instanceof \ReflectionNamedType) {
+                // Nested composite types are not supported yet.
+                return [];
+            }
+
             $phpTypeOrClass = $type->getName();
             if ('null' === $phpTypeOrClass || 'mixed' === $phpTypeOrClass || 'never' === $phpTypeOrClass) {
                 continue;
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
index 3f97527b720da..315171333d137 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
@@ -281,10 +281,14 @@ public function testExtractPhp82Type($property, array $type = null)
         $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php82Dummy', $property, []));
     }
 
-    public function php82TypesProvider()
+    public function php82TypesProvider(): iterable
     {
         yield ['nil', null];
         yield ['false', [new Type(Type::BUILTIN_TYPE_FALSE)]];
+
+        // Nesting intersection and union types is not supported yet,
+        // but we should make sure this kind of composite types does not crash the extractor.
+        yield ['someCollection', null];
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php82Dummy.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php82Dummy.php
index b830fabf8842a..784c868369390 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php82Dummy.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php82Dummy.php
@@ -16,4 +16,6 @@ class Php82Dummy
     public null $nil = null;
 
     public false $false = false;
+
+    public (\Traversable&\Countable)|null $someCollection = null;
 }