From a03c13f304d8f2ac7050b4948c0a65d5994ba837 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Wed, 7 Jan 2026 08:26:49 -1000
Subject: [PATCH] [esp32_hosted] Add SHA256 alignment for hardware DMA
 compatibility (#13050)

---
 esphome/components/esp32_hosted/update/esp32_hosted_update.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp b/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp
index 626bda3af3..3598a2e69c 100644
--- a/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp
+++ b/esphome/components/esp32_hosted/update/esp32_hosted_update.cpp
@@ -90,7 +90,8 @@ void Esp32HostedUpdate::perform(bool force) {
     return;
   }
 
-  sha256::SHA256 hasher;
+  // ESP32-S3 hardware SHA acceleration requires 32-byte DMA alignment (IDF 5.5.x+)
+  alignas(32) sha256::SHA256 hasher;
   hasher.init();
   hasher.add(this->firmware_data_, this->firmware_size_);
   hasher.calculate();