diff --git a/Zend/zend_cpuinfo.h b/Zend/zend_cpuinfo.h
index c81865c4a4d1a..7e53ba654dd41 100644
--- a/Zend/zend_cpuinfo.h
+++ b/Zend/zend_cpuinfo.h
@@ -127,58 +127,86 @@ ZEND_API int zend_cpu_supports(zend_cpu_feature feature);
  * functions */
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_sse2(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("sse2");
+#endif
 }
 
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_sse3(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("sse3");
+#endif
 }
 
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_ssse3(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("ssse3");
+#endif
 }
 
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_sse41(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("sse4.1");
+#endif
 }
 
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_sse42(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("sse4.2");
+#endif
 }
 
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_avx(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("avx");
+#endif
 }
 
 ZEND_NO_SANITIZE_ADDRESS
 static inline int zend_cpu_supports_avx2(void) {
+#ifdef __aarch64__
+	return 0;
+#else
 #ifdef PHP_HAVE_BUILTIN_CPU_INIT
 	__builtin_cpu_init();
 #endif
 	return __builtin_cpu_supports("avx2");
+#endif
 }
 
 #ifdef PHP_HAVE_AVX512_SUPPORTS
diff --git a/ext/bcmath/bcmath.c b/ext/bcmath/bcmath.c
index 2e9cb6c3ad774..df2b96e68a715 100644
--- a/ext/bcmath/bcmath.c
+++ b/ext/bcmath/bcmath.c
@@ -991,6 +991,12 @@ static zval *bcmath_number_read_property(zend_object *obj, zend_string *name, in
 	return zend_std_read_property(obj, name, type, cache_slot, rv);
 }
 
+static zval *bcmath_number_get_property_ptr_ptr(zend_object *object, zend_string *member, int type, void **cache_slot)
+{
+	/* Must always go through read property because all properties are virtual, and no dynamic properties are allowed. */
+	return NULL;
+}
+
 static int bcmath_number_has_property(zend_object *obj, zend_string *name, int check_empty, void **cache_slot)
 {
 	if (check_empty == ZEND_PROPERTY_NOT_EMPTY) {
@@ -1034,6 +1040,7 @@ static void bcmath_number_register_class(void)
 	bcmath_number_obj_handlers.unset_property = bcmath_number_unset_property;
 	bcmath_number_obj_handlers.has_property = bcmath_number_has_property;
 	bcmath_number_obj_handlers.read_property = bcmath_number_read_property;
+	bcmath_number_obj_handlers.get_property_ptr_ptr = bcmath_number_get_property_ptr_ptr;
 	bcmath_number_obj_handlers.get_properties_for = bcmath_number_get_properties_for;
 	bcmath_number_obj_handlers.cast_object = bcmath_number_cast_object;
 }
diff --git a/ext/bcmath/tests/number/gh18641.phpt b/ext/bcmath/tests/number/gh18641.phpt
new file mode 100644
index 0000000000000..ed8f55e9145a7
--- /dev/null
+++ b/ext/bcmath/tests/number/gh18641.phpt
@@ -0,0 +1,13 @@
+--TEST--
+GH-18641 (Accessing a BcMath\Number property by ref crashes)
+--EXTENSIONS--
+bcmath
+--FILE--
+<?php
+$a = new BCMath\Number("1");
+$fusion = $a;
+$x = &$fusion->value;
+var_dump($x);
+?>
+--EXPECT--
+string(1) "1"
diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index 30f84d610022f..d292921856909 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -473,13 +473,14 @@ char **php_readline_completion_cb(const char *text, int start, int end)
 				/* libedit will read matches[2] */
 				matches = calloc(3, sizeof(char *));
 				if (!matches) {
-					return NULL;
+					goto out;
 				}
 				matches[0] = strdup("");
 			}
 		}
 	}
 
+out:
 	zval_ptr_dtor(&params[0]);
 	zval_ptr_dtor(&_readline_array);
 
diff --git a/ext/soap/php_http.c b/ext/soap/php_http.c
index a55780615f4d8..a1bd7dff0c8a5 100644
--- a/ext/soap/php_http.c
+++ b/ext/soap/php_http.c
@@ -411,6 +411,7 @@ int make_http_soap_request(zval        *this_ptr,
 			} else {
 				zval_ptr_dtor(&params[0]);
 				zval_ptr_dtor(&func);
+				zval_ptr_dtor(&retval);
 				if (request != buf) {
 					zend_string_release_ex(request, 0);
 				}
@@ -1329,6 +1330,7 @@ int make_http_soap_request(zval        *this_ptr,
 		} else {
 			zval_ptr_dtor(&params[0]);
 			zval_ptr_dtor(&func);
+			zval_ptr_dtor(&retval);
 			efree(content_encoding);
 			zend_string_release_ex(http_headers, 0);
 			zend_string_release_ex(http_body, 0);