diff --git a/Misc/NEWS b/Misc/NEWS
index 6b256b6..fff00dd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -9,6 +9,12 @@
 
 *Release date: XX-XXX-20XX*
 
+Core and builtins
+-----------------
+
+- Issue #6990: Fix threading.local subclasses leaving old state around
+  after a reference cycle GC which could be recycled by new locals.
+
 Library
 -------