diff --git a/src/Symfony/Component/VarDumper/Caster/SocketCaster.php b/src/Symfony/Component/VarDumper/Caster/SocketCaster.php
new file mode 100644
index 0000000000000..98af209e5623e
--- /dev/null
+++ b/src/Symfony/Component/VarDumper/Caster/SocketCaster.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\VarDumper\Caster;
+
+use Symfony\Component\VarDumper\Cloner\Stub;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+final class SocketCaster
+{
+    public static function castSocket(\Socket $h, array $a, Stub $stub, bool $isNested): array
+    {
+        if (\PHP_VERSION_ID >= 80300 && socket_atmark($h)) {
+            $a[Caster::PREFIX_VIRTUAL.'atmark'] = true;
+        }
+
+        if (!$lastError = socket_last_error($h)) {
+            return $a;
+        }
+
+        static $errors;
+
+        if (!$errors) {
+            $errors = get_defined_constants(true)['sockets'] ?? [];
+            $errors = array_flip(array_filter($errors, static fn ($k) => str_starts_with($k, 'SOCKET_E'), \ARRAY_FILTER_USE_KEY));
+        }
+
+        $a[Caster::PREFIX_VIRTUAL.'last_error'] = new ConstStub($errors[$lastError], socket_strerror($lastError));
+
+        return $a;
+    }
+}
diff --git a/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php b/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
index d8dcd80a6b7fc..1fe4bd2939b0c 100644
--- a/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
+++ b/src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php
@@ -25,6 +25,7 @@ abstract class AbstractCloner implements ClonerInterface
         '__PHP_Incomplete_Class' => ['Symfony\Component\VarDumper\Caster\Caster', 'castPhpIncompleteClass'],
 
         'AddressInfo' => ['Symfony\Component\VarDumper\Caster\AddressInfoCaster', 'castAddressInfo'],
+        'Socket' => ['Symfony\Component\VarDumper\Caster\SocketCaster', 'castSocket'],
 
         'Symfony\Component\VarDumper\Caster\CutStub' => ['Symfony\Component\VarDumper\Caster\StubCaster', 'castStub'],
         'Symfony\Component\VarDumper\Caster\CutArrayStub' => ['Symfony\Component\VarDumper\Caster\StubCaster', 'castCutArray'],