diff --git a/vendor/magento/module-checkout/Controller/Cart/Add.php b/vendor/magento/module-checkout/Controller/Cart/Add.php
index 009505d8e7b..b5d0e20f05a 100644
--- a/vendor/magento/module-checkout/Controller/Cart/Add.php
+++ b/vendor/magento/module-checkout/Controller/Cart/Add.php
@@ -6,10 +6,11 @@
  */
 namespace Magento\Checkout\Controller\Cart;
 
-use Magento\Checkout\Model\Cart\RequestQuantityProcessor;
-use Magento\Framework\App\Action\HttpPostActionInterface as HttpPostActionInterface;
 use Magento\Catalog\Api\ProductRepositoryInterface;
+use Magento\Checkout\Model\AddProductToCart;
 use Magento\Checkout\Model\Cart as CustomerCart;
+use Magento\Checkout\Model\Cart\RequestQuantityProcessor;
+use Magento\Framework\App\Action\HttpPostActionInterface as HttpPostActionInterface;
 use Magento\Framework\App\ObjectManager;
 use Magento\Framework\App\ResponseInterface;
 use Magento\Framework\Controller\ResultInterface;
@@ -32,6 +33,11 @@ class Add extends \Magento\Checkout\Controller\Cart implements HttpPostActionInt
      */
     private $quantityProcessor;
 
+    /**
+     * @var AddProductToCart
+     */
+    private AddProductToCart $addProductToCart;
+
     /**
      * @param \Magento\Framework\App\Action\Context $context
      * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
@@ -41,6 +47,7 @@ class Add extends \Magento\Checkout\Controller\Cart implements HttpPostActionInt
      * @param CustomerCart $cart
      * @param ProductRepositoryInterface $productRepository
      * @param RequestQuantityProcessor|null $quantityProcessor
+     * @param AddProductToCart|null $addProductToCart
      * @codeCoverageIgnore
      */
     public function __construct(
@@ -51,7 +58,8 @@ class Add extends \Magento\Checkout\Controller\Cart implements HttpPostActionInt
         \Magento\Framework\Data\Form\FormKey\Validator $formKeyValidator,
         CustomerCart $cart,
         ProductRepositoryInterface $productRepository,
-        ?RequestQuantityProcessor $quantityProcessor = null
+        ?RequestQuantityProcessor $quantityProcessor = null,
+        ?AddProductToCart $addProductToCart = null
     ) {
         parent::__construct(
             $context,
@@ -64,6 +72,8 @@ class Add extends \Magento\Checkout\Controller\Cart implements HttpPostActionInt
         $this->productRepository = $productRepository;
         $this->quantityProcessor = $quantityProcessor
             ?? ObjectManager::getInstance()->get(RequestQuantityProcessor::class);
+        $this->addProductToCart = $addProductToCart
+            ?? ObjectManager::getInstance()->get(AddProductToCart::class);
     }
 
     /**
@@ -122,11 +132,7 @@ class Add extends \Magento\Checkout\Controller\Cart implements HttpPostActionInt
                 return $this->goBack();
             }
 
-            $this->cart->addProduct($product, $params);
-            if (!empty($related)) {
-                $this->cart->addProductsByIds(explode(',', $related));
-            }
-            $this->cart->save();
+            $this->addProductToCart->execute($this->cart, $product, $params, $related ? explode(',', $related) : []);
 
             /**
              * @todo remove wishlist observer \Magento\Wishlist\Observer\AddToCart
diff --git a/vendor/magento/module-checkout/Model/AddProductToCart.php b/vendor/magento/module-checkout/Model/AddProductToCart.php
new file mode 100644
index 00000000000..57d049f81aa
--- /dev/null
+++ b/vendor/magento/module-checkout/Model/AddProductToCart.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * Copyright 2024 Adobe
+ * All Rights Reserved.
+ */
+declare(strict_types=1);
+
+namespace Magento\Checkout\Model;
+
+use Magento\Catalog\Model\Product;
+use Magento\Framework\Stdlib\DateTime\DateTime;
+use Magento\Quote\Api\CartRepositoryInterfaceFactory;
+use Magento\Quote\Api\Data\CartInterface;
+use Magento\Quote\Model\QuoteMutexInterface;
+
+class AddProductToCart
+{
+    /**
+     * @param QuoteMutexInterface $quoteMutex
+     * @param CartRepositoryInterfaceFactory $quoteRepositoryFactory
+     * @param DateTime $dateTime
+     */
+    public function __construct(
+        private readonly QuoteMutexInterface $quoteMutex,
+        private readonly CartRepositoryInterfaceFactory $quoteRepositoryFactory,
+        private readonly DateTime $dateTime
+    ) {
+    }
+
+    /**
+     * Add product to cart
+     *
+     * @param Cart $cart
+     * @param Product $product
+     * @param array $buyRequest Buy request info
+     * @param array $related Product IDs to add to the cart along with the main product
+     * @return bool
+     * @throws \Throwable
+     */
+    public function execute(Cart $cart, Product $product, array $buyRequest = [], array $related = []): bool
+    {
+        if (!$cart->getQuote()->getId()) {
+            return $this->add($cart, $product, $buyRequest, $related);
+        }
+
+        return $this->quoteMutex->execute(
+            [(int) $cart->getQuote()->getId()],
+            function (array $quotes = []) use ($cart, $product, $buyRequest, $related) {
+                $reload = true;
+                // check if the mutex provided the quote
+                if (!empty($quotes)) {
+                    // check if the quote was updated since the last load
+                    // if not, we can use the quote in memory to avoid full reload which is expensive and unnecessary
+                    $lastUpdatedAt = $cart->getQuote()->getUpdatedAt()
+                        ?: $cart->getQuote()->getOrigData(CartInterface::KEY_UPDATED_AT);
+                    $quote = current($quotes);
+                    $updatedAt = $quote->getUpdatedAt();
+                    $reload = $updatedAt
+                        && $lastUpdatedAt
+                        && $this->dateTime->timestamp($updatedAt) > $this->dateTime->timestamp($lastUpdatedAt);
+                }
+                if ($reload) {
+                    // bypass repository cache by creating a new repository instead of using the shared repository
+                    $quote = $this->quoteRepositoryFactory->create()->getActive($cart->getQuote()->getId());
+                    $cart->setQuote($quote);
+                    $cart->getCheckoutSession()->replaceQuote($quote);
+                }
+                return $this->add($cart, $product, $buyRequest, $related);
+            },
+        );
+    }
+
+    /**
+     * Add product to cart
+     *
+     * @param Cart $cart
+     * @param Product $product
+     * @param array $buyRequest
+     * @param array $related
+     * @return bool
+     */
+    private function add(Cart $cart, Product $product, array $buyRequest, array $related = []): bool
+    {
+        $cart->addProduct($product, $buyRequest);
+        if (!empty($related)) {
+            $cart->addProductsByIds($related);
+        }
+        $cart->save();
+        return true;
+    }
+}
diff --git a/vendor/magento/module-checkout/etc/di.xml b/vendor/magento/module-checkout/etc/di.xml
index 9a23e034385..590c4478d87 100644
--- a/vendor/magento/module-checkout/etc/di.xml
+++ b/vendor/magento/module-checkout/etc/di.xml
@@ -56,4 +56,9 @@
     <type name="Magento\Customer\Model\ResourceModel\Customer">
         <plugin name="recollect_quote_on_customer_group_change" type="Magento\Checkout\Model\Plugin\RecollectQuoteOnCustomerGroupChange"/>
     </type>
+    <type name="Magento\Checkout\Model\AddProductToCart">
+        <arguments>
+            <argument name="quoteMutex" xsi:type="object">Magento\Quote\Model\ResourceModel\LoadQuoteByIdMutex</argument>
+        </arguments>
+    </type>
 </config>
diff --git a/vendor/magento/module-quote/Model/ResourceModel/LoadQuoteByIdMutex.php b/vendor/magento/module-quote/Model/ResourceModel/LoadQuoteByIdMutex.php
new file mode 100644
index 00000000000..de477cb3dff
--- /dev/null
+++ b/vendor/magento/module-quote/Model/ResourceModel/LoadQuoteByIdMutex.php
@@ -0,0 +1,59 @@
+<?php
+/**
+ * Copyright 2024 Adobe
+ * All Rights Reserved.
+ */
+declare(strict_types=1);
+
+namespace Magento\Quote\Model\ResourceModel;
+
+use Magento\Quote\Model\QuoteFactory;
+use Magento\Quote\Model\QuoteMutexInterface;
+use Magento\Quote\Model\ResourceModel\Quote as QuoteResourceModel;
+
+class LoadQuoteByIdMutex implements QuoteMutexInterface
+{
+    /**
+     * @param QuoteResourceModel $quoteResourceModel
+     * @param QuoteFactory $quoteFactory
+     */
+    public function __construct(
+        private readonly QuoteResourceModel $quoteResourceModel,
+        private readonly QuoteFactory $quoteFactory
+    ) {
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function execute(array $maskedIds, callable $callable, array $args = [])
+    {
+        if (empty($maskedIds)) {
+            throw new \InvalidArgumentException('Quote ids must be provided');
+        }
+
+        $connection = $this->quoteResourceModel->getConnection();
+        $connection->beginTransaction();
+        $query = $connection->select()
+            ->from($this->quoteResourceModel->getMainTable())
+            ->where($connection->prepareSqlCondition($this->quoteResourceModel->getIdFieldName(), ['in' => $maskedIds]))
+            ->forUpdate(true);
+        $rows = $connection->fetchAll($query);
+        $quotes = [];
+        foreach ($rows as $data) {
+            $quote = $this->quoteFactory->create();
+            $quote->setData($data);
+            $quote->setOrigData();
+            $quotes[] = $quote;
+        }
+        $args[] = $quotes;
+        try {
+            $result = $callable(...$args);
+            $connection->commit();
+            return $result;
+        } catch (\Throwable $e) {
+            $connection->rollBack();
+            throw $e;
+        }
+    }
+}