diff --git a/ext/standard/streamsfuncs.c b/ext/standard/streamsfuncs.c
index 53fa8d33dad6b..18e80ddda32ab 100644
--- a/ext/standard/streamsfuncs.c
+++ b/ext/standard/streamsfuncs.c
@@ -127,6 +127,9 @@ PHP_FUNCTION(stream_socket_client)
 
 	if (timeout_is_null) {
 		timeout = (double)FG(default_socket_timeout);
+	} else if (!zend_finite(timeout)) {
+		zend_argument_value_error(4, "must be a finite value");
+		RETURN_THROWS();
 	}
 
 	context = php_stream_context_from_zval(zcontext, flags & PHP_FILE_NO_DEFAULT_CONTEXT);
@@ -279,6 +282,9 @@ PHP_FUNCTION(stream_socket_accept)
 
 	if (timeout_is_null) {
 		timeout = (double)FG(default_socket_timeout);
+	} else if (!zend_finite(timeout)) {
+		zend_argument_value_error(2, "must be a finite value");
+		RETURN_THROWS();
 	}
 
 	php_stream_from_zval(stream, zstream);
diff --git a/ext/standard/tests/streams/non_finite_values.phpt b/ext/standard/tests/streams/non_finite_values.phpt
new file mode 100644
index 0000000000000..5dba0d3b48266
--- /dev/null
+++ b/ext/standard/tests/streams/non_finite_values.phpt
@@ -0,0 +1,31 @@
+--TEST--
+Non-finite timeout values in stream functions
+--FILE--
+<?php
+$socket = stream_socket_server("tcp://0.0.0.0:14781", $errno, $errstr);
+foreach ([NAN, -NAN, INF, -INF] as $value) {
+    try {
+        stream_socket_accept($socket, $value);
+    } catch (ValueError $e) {
+        echo $e->getMessage(), "\n";
+    }
+}
+fclose($socket);
+
+foreach ([NAN, -NAN, INF, -INF] as $value) {
+    try {
+        stream_socket_client("tcp://0.0.0.0:14781", timeout: $value);
+    } catch (ValueError $e) {
+        echo $e->getMessage(), "\n";
+    }
+}
+?>
+--EXPECT--
+stream_socket_accept(): Argument #2 ($timeout) must be a finite value
+stream_socket_accept(): Argument #2 ($timeout) must be a finite value
+stream_socket_accept(): Argument #2 ($timeout) must be a finite value
+stream_socket_accept(): Argument #2 ($timeout) must be a finite value
+stream_socket_client(): Argument #4 ($timeout) must be a finite value
+stream_socket_client(): Argument #4 ($timeout) must be a finite value
+stream_socket_client(): Argument #4 ($timeout) must be a finite value
+stream_socket_client(): Argument #4 ($timeout) must be a finite value