diff --git a/CHANGES b/CHANGES
index d0acd0d93..8b4996c10 100644
--- a/CHANGES
+++ b/CHANGES
@@ -17,6 +17,8 @@ Bugs fixed
 ----------
 
 * #7808: autodoc: Warnings raised on variable and attribute type annotations
+* #7812: autosummary: generates broken stub files if the target code contains
+  an attribute and module that are same name
 * #7811: sphinx.util.inspect causes circular import problem
 
 Testing
diff --git a/sphinx/util/__init__.py b/sphinx/util/__init__.py
index ca9bb028d..b28c62fc3 100644
--- a/sphinx/util/__init__.py
+++ b/sphinx/util/__init__.py
@@ -615,13 +615,28 @@ def split_full_qualified_name(name: str) -> Tuple[str, str]:
               Therefore you need to mock 3rd party modules if needed before
               calling this function.
     """
+    from sphinx.util import inspect
+
     parts = name.split('.')
     for i, part in enumerate(parts, 1):
         try:
             modname = ".".join(parts[:i])
-            import_module(modname)
+            module = import_module(modname)
+
+            # check the module has a member named as attrname
+            #
+            # Note: This is needed to detect the attribute having the same name
+            #       as the module.
+            #       ref: https://github.com/sphinx-doc/sphinx/issues/7812
+            attrname = parts[i]
+            if hasattr(module, attrname):
+                value = inspect.safe_getattr(module, attrname)
+                if not inspect.ismodule(value):
+                    return ".".join(parts[:i]), ".".join(parts[i:])
         except ImportError:
             return ".".join(parts[:i - 1]), ".".join(parts[i - 1:])
+        except IndexError:
+            pass
 
     return name, ""
 
diff --git a/sphinx/util/inspect.py b/sphinx/util/inspect.py
index d4928c847..206be1f9b 100644
--- a/sphinx/util/inspect.py
+++ b/sphinx/util/inspect.py
@@ -18,7 +18,7 @@ import typing
 import warnings
 from functools import partial, partialmethod
 from inspect import (  # NOQA
-    Parameter, isclass, ismethod, ismethoddescriptor
+    Parameter, isclass, ismethod, ismethoddescriptor, ismodule
 )
 from io import StringIO
 from typing import Any, Callable, Mapping, List, Optional, Tuple