@@ -165,6 +165,14 @@ def test_delete_connection_text_factory(self):
         with self.assertRaises(AttributeError):
             del self.con.text_factory
 
+    def test_delete_cursor_row_factory(self):
+        # gh-149738: deleting row_factory should raise an exception
+        cur = self.con.cursor()
+        with self.assertRaises(AttributeError):
+            del cur.row_factory
+        # Executing a query here should succeed.
+        self.assertEqual(tuple(cur.execute("select 1").fetchone()), (1,))
+
     def test_sqlite_row_index_unicode(self):
         row = self.con.execute("select 1 as \xff").fetchone()
         self.assertEqual(row["\xff"], 1)
 
@@ -0,0 +1,2 @@
+:mod:`sqlite3`: Disallow removing the ``row_factory`` attribute of a cursor
+to prevent a crash on a query.
@@ -1357,13 +1357,33 @@ static struct PyMemberDef cursor_members[] =
     {"description", _Py_T_OBJECT, offsetof(pysqlite_Cursor, description), Py_READONLY},
     {"lastrowid", _Py_T_OBJECT, offsetof(pysqlite_Cursor, lastrowid), Py_READONLY},
     {"rowcount", Py_T_LONG, offsetof(pysqlite_Cursor, rowcount), Py_READONLY},
-    {"row_factory", _Py_T_OBJECT, offsetof(pysqlite_Cursor, row_factory), 0},
     {"__weaklistoffset__", Py_T_PYSSIZET, offsetof(pysqlite_Cursor, in_weakreflist), Py_READONLY},
     {NULL}
 };
 
+static PyObject *
+cursor_get_row_factory(PyObject *op, void *Py_UNUSED(closure))
+{
+    pysqlite_Cursor *self = (pysqlite_Cursor *)op;
+    return Py_NewRef(self->row_factory);
+}
+
+static int
+cursor_set_row_factory(PyObject *op, PyObject *value, void *Py_UNUSED(closure))
+{
+    pysqlite_Cursor *self = (pysqlite_Cursor *)op;
+    if (value == NULL) {
+        PyErr_SetString(PyExc_AttributeError,
+                        "cannot delete row_factory attribute");
+        return -1;
+    }
+    Py_XSETREF(self->row_factory, Py_NewRef(value));
+    return 0;
+}
+
 static struct PyGetSetDef cursor_getsets[] = {
     _SQLITE3_CURSOR_ARRAYSIZE_GETSETDEF
+    {"row_factory", cursor_get_row_factory, cursor_set_row_factory},
     {NULL},
 };
Original file line number	Diff line number	Diff line change
@@ -0,0 +1,2 @@
	1	+ :mod:`sqlite3`: Disallow removing the ``row_factory`` attribute of a cursor
	2	+ to prevent a crash on a query.