diff --git a/NEWS b/NEWS
index cb16871317d..1da82f4baa4 100644
--- a/NEWS
+++ b/NEWS
@@ -60,6 +60,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-14290 (Member access within null pointer in extension spl).
     (nielsdos)
 
+- Streams:
+  . Fixed bug GH-11078 (PHP Fatal error triggers pointer being freed was not
+    allocated and malloc: double free for ptr errors). (nielsdos)
+
 06 Jun 2024, PHP 8.3.8
 
 - CGI:
diff --git a/ext/zend_test/test.c b/ext/zend_test/test.c
index 7fc815c9d60..e4a8870f77e 100644
--- a/ext/zend_test/test.c
+++ b/ext/zend_test/test.c
@@ -750,6 +750,38 @@ static ZEND_FUNCTION(zend_test_set_fmode)
 }
 #endif
 
+static ZEND_FUNCTION(zend_test_cast_fread)
+{
+	zval *stream_zv;
+	php_stream *stream;
+	FILE *fp;
+
+	ZEND_PARSE_PARAMETERS_START(1, 1)
+		Z_PARAM_RESOURCE(stream_zv);
+	ZEND_PARSE_PARAMETERS_END();
+
+	php_stream_from_zval(stream, stream_zv);
+
+	if (php_stream_cast(stream, PHP_STREAM_AS_STDIO, (void *) &fp, REPORT_ERRORS) == FAILURE) {
+		return;
+	}
+
+	size_t size = 10240; /* Must be large enough to trigger the issue */
+	char *buf = malloc(size);
+	bool bail = false;
+	zend_try {
+		(void) !fread(buf, 1, size, fp);
+	} zend_catch {
+		bail = true;
+	} zend_end_try();
+
+	free(buf);
+
+	if (bail) {
+		zend_bailout();
+	}
+}
+
 static zend_object *zend_test_class_new(zend_class_entry *class_type)
 {
 	zend_object *obj = zend_objects_new(class_type);
diff --git a/ext/zend_test/test.stub.php b/ext/zend_test/test.stub.php
index ffed975ecf5..abe51785612 100644
--- a/ext/zend_test/test.stub.php
+++ b/ext/zend_test/test.stub.php
@@ -250,6 +250,9 @@ function zend_test_override_libxml_global_state(): void {}
 #if defined(PHP_WIN32)
     function zend_test_set_fmode(bool $binary): void {}
 #endif
+
+    /** @param resource $stream */
+    function zend_test_cast_fread($stream): void {}
 }
 
 namespace ZendTestNS {
diff --git a/ext/zend_test/test_arginfo.h b/ext/zend_test/test_arginfo.h
index 2125f2852b8..66dbaccc681 100644
--- a/ext/zend_test/test_arginfo.h
+++ b/ext/zend_test/test_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 4d9128205072443957f6229e09153a04c59cce74 */
+ * Stub hash: 98329c979738792b2fc672d5b5c5a4b5dc0271f4 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_zend_test_array_return, 0, 0, IS_ARRAY, 0)
 ZEND_END_ARG_INFO()
@@ -150,6 +150,10 @@ ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_zend_test_set_fmode, 0, 1, IS_VO
 ZEND_END_ARG_INFO()
 #endif
 
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_zend_test_cast_fread, 0, 1, IS_VOID, 0)
+	ZEND_ARG_INFO(0, stream)
+ZEND_END_ARG_INFO()
+
 #define arginfo_ZendTestNS2_namespaced_func arginfo_zend_test_is_pcre_bundled
 
 #define arginfo_ZendTestNS2_namespaced_deprecated_func arginfo_zend_test_void_return
@@ -275,6 +279,7 @@ static ZEND_FUNCTION(zend_test_is_pcre_bundled);
 #if defined(PHP_WIN32)
 static ZEND_FUNCTION(zend_test_set_fmode);
 #endif
+static ZEND_FUNCTION(zend_test_cast_fread);
 static ZEND_FUNCTION(ZendTestNS2_namespaced_func);
 static ZEND_FUNCTION(ZendTestNS2_namespaced_deprecated_func);
 static ZEND_FUNCTION(ZendTestNS2_ZendSubNS_namespaced_func);
@@ -351,6 +356,7 @@ static const zend_function_entry ext_functions[] = {
 #if defined(PHP_WIN32)
 	ZEND_FE(zend_test_set_fmode, arginfo_zend_test_set_fmode)
 #endif
+	ZEND_FE(zend_test_cast_fread, arginfo_zend_test_cast_fread)
 	ZEND_NS_FALIAS("ZendTestNS2", namespaced_func, ZendTestNS2_namespaced_func, arginfo_ZendTestNS2_namespaced_func)
 	ZEND_NS_DEP_FALIAS("ZendTestNS2", namespaced_deprecated_func, ZendTestNS2_namespaced_deprecated_func, arginfo_ZendTestNS2_namespaced_deprecated_func)
 	ZEND_NS_FALIAS("ZendTestNS2", namespaced_aliased_func, zend_test_void_return, arginfo_ZendTestNS2_namespaced_aliased_func)
diff --git a/ext/zend_test/tests/gh11078.phpt b/ext/zend_test/tests/gh11078.phpt
new file mode 100644
index 00000000000..5279d703b27
--- /dev/null
+++ b/ext/zend_test/tests/gh11078.phpt
@@ -0,0 +1,34 @@
+--TEST--
+GH-11078 (PHP Fatal error triggers pointer being freed was not allocated and malloc: double free for ptr errors)
+--EXTENSIONS--
+zend_test
+--SKIPIF--
+<?php
+if (getenv('USE_ZEND_ALLOC') === '0') die('skip Zend MM disabled');
+if (PHP_OS_FAMILY === 'Windows') die('skip Windows does not support generic stream casting');
+?>
+--FILE--
+<?php
+
+const MEM = 32 * 1024 * 1024;
+ini_set('memory_limit', MEM);
+
+class CrashingFifo {
+    public $context;
+
+    function stream_open($path, $mode, $options, &$opened_path): bool {
+        return true;
+    }
+
+    function stream_read(int $count): false|string|null {
+        return str_repeat('x', MEM);
+    }
+}
+
+stream_register_wrapper('fifo', CrashingFifo::class);
+$readStream = fopen('fifo://1', 'r');
+zend_test_cast_fread($readStream);
+
+?>
+--EXPECTF--
+Fatal error: Allowed memory size of %d bytes exhausted %s
diff --git a/main/streams/cast.c b/main/streams/cast.c
index 8d9f4a9d2d5..c4ab3d367c4 100644
--- a/main/streams/cast.c
+++ b/main/streams/cast.c
@@ -46,7 +46,14 @@ typedef struct {
 
 FILE *fopencookie(void *cookie, const char *mode, COOKIE_IO_FUNCTIONS_T *funcs)
 {
-	return funopen(cookie, funcs->reader, funcs->writer, funcs->seeker, funcs->closer);
+	FILE *file = funopen(cookie, funcs->reader, funcs->writer, funcs->seeker, funcs->closer);
+	if (file) {
+		/* Buffering of FILE handles is stateful.
+		 * A bailout during these can corrupt the state of the FILE handle
+		 * and cause memory corruption errors. See GH-11078. */
+		setvbuf(file, NULL, _IONBF, 0);
+	}
+	return file;
 }
 # define HAVE_FOPENCOOKIE 1
 # define PHP_EMULATE_FOPENCOOKIE 1