diff --git a/esphome/components/ethernet/__init__.py b/esphome/components/ethernet/__init__.py
index 52f5f44d410..935d2004d49 100644
--- a/esphome/components/ethernet/__init__.py
+++ b/esphome/components/ethernet/__init__.py
@@ -218,12 +218,19 @@ def _validate(config):
                 )
     elif config[CONF_TYPE] != "OPENETH":
         if CONF_CLK_MODE in config:
+            mode, pin = CLK_MODES_DEPRECATED[config[CONF_CLK_MODE]]
             LOGGER.warning(
-                "[ethernet] The 'clk_mode' option is deprecated and will be removed in ESPHome 2026.1. "
-                "Please update your configuration to use 'clk' instead."
+                "[ethernet] The 'clk_mode' option is deprecated. "
+                "Please replace 'clk_mode: %s' with:\n"
+                "  clk:\n"
+                "    mode: %s\n"
+                "    pin: %s\n"
+                "Removal scheduled for 2026.7.0.",
+                config[CONF_CLK_MODE],
+                mode,
+                pin,
             )
-            mode = CLK_MODES_DEPRECATED[config[CONF_CLK_MODE]]
-            config[CONF_CLK] = CLK_SCHEMA({CONF_MODE: mode[0], CONF_PIN: mode[1]})
+            config[CONF_CLK] = CLK_SCHEMA({CONF_MODE: mode, CONF_PIN: pin})
             del config[CONF_CLK_MODE]
         elif CONF_CLK not in config:
             raise cv.Invalid("'clk' is a required option for [ethernet].")
diff --git a/esphome/components/socket/socket.cpp b/esphome/components/socket/socket.cpp
index 2fcc162eadc..6154c497e0c 100644
--- a/esphome/components/socket/socket.cpp
+++ b/esphome/components/socket/socket.cpp
@@ -59,8 +59,14 @@ size_t format_sockaddr_to(const struct sockaddr *addr_ptr, socklen_t len, std::s
 #if USE_NETWORK_IPV6
   else if (addr_ptr->sa_family == AF_INET6 && len >= sizeof(sockaddr_in6)) {
     const auto *addr = reinterpret_cast<const struct sockaddr_in6 *>(addr_ptr);
-#ifndef USE_SOCKET_IMPL_LWIP_TCP
-    // Format IPv4-mapped IPv6 addresses as regular IPv4 (not supported on ESP8266 raw TCP)
+#ifdef USE_HOST
+    // Format IPv4-mapped IPv6 addresses as regular IPv4 (POSIX layout, no LWIP union)
+    if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr) &&
+        esphome_inet_ntop4(&addr->sin6_addr.s6_addr[12], buf.data(), buf.size()) != nullptr) {
+      return strlen(buf.data());
+    }
+#elif !defined(USE_SOCKET_IMPL_LWIP_TCP)
+    // Format IPv4-mapped IPv6 addresses as regular IPv4 (LWIP layout)
     if (addr->sin6_addr.un.u32_addr[0] == 0 && addr->sin6_addr.un.u32_addr[1] == 0 &&
         addr->sin6_addr.un.u32_addr[2] == htonl(0xFFFF) &&
         esphome_inet_ntop4(&addr->sin6_addr.un.u32_addr[3], buf.data(), buf.size()) != nullptr) {
diff --git a/tests/components/socket/common.yaml b/tests/components/socket/common.yaml
new file mode 100644
index 00000000000..aaf49f16112
--- /dev/null
+++ b/tests/components/socket/common.yaml
@@ -0,0 +1,11 @@
+substitutions:
+  network_enable_ipv6: "false"
+
+socket:
+
+wifi:
+  ssid: MySSID
+  password: password1
+
+network:
+  enable_ipv6: ${network_enable_ipv6}
diff --git a/tests/components/socket/test-ipv6.esp32-idf.yaml b/tests/components/socket/test-ipv6.esp32-idf.yaml
new file mode 100644
index 00000000000..da1324b17ef
--- /dev/null
+++ b/tests/components/socket/test-ipv6.esp32-idf.yaml
@@ -0,0 +1,4 @@
+substitutions:
+  network_enable_ipv6: "true"
+
+<<: !include common.yaml
diff --git a/tests/components/socket/test-ipv6.host.yaml b/tests/components/socket/test-ipv6.host.yaml
new file mode 100644
index 00000000000..fdd52c574e1
--- /dev/null
+++ b/tests/components/socket/test-ipv6.host.yaml
@@ -0,0 +1,4 @@
+socket:
+
+network:
+  enable_ipv6: true
diff --git a/tests/components/socket/test.esp32-idf.yaml b/tests/components/socket/test.esp32-idf.yaml
new file mode 100644
index 00000000000..dade44d145b
--- /dev/null
+++ b/tests/components/socket/test.esp32-idf.yaml
@@ -0,0 +1 @@
+<<: !include common.yaml
diff --git a/tests/components/socket/test.host.yaml b/tests/components/socket/test.host.yaml
new file mode 100644
index 00000000000..e0c5d7cea3a
--- /dev/null
+++ b/tests/components/socket/test.host.yaml
@@ -0,0 +1,3 @@
+socket:
+
+network: