Issue #21310: Fixed possible resource leak in failed open().
diff --git a/Misc/NEWS b/Misc/NEWS
index e3827bb..7759edb 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -25,6 +25,8 @@
 Library
 -------
 
+- Issue #21310: Fixed possible resource leak in failed open().
+
 - Issue #21304: Backport the key derivation function hashlib.pbkdf2_hmac from
   Python 3 per PEP 466.