diff --git a/Misc/NEWS b/Misc/NEWS
index 0ef8b05..5f1d905 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,9 @@
   file name rather than a ZipInfo instance, so files are extracted with
   mode 0600 rather than 000 under Unix.
 
+- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
+  asking for a specific length.
+
 
 What's new in Python 3.0b2?
 ===========================