python
diff --git a/‎Misc/NEWS.d/next/Core_and_Builtins/2026-08-01-09-52-23.gh-issue-154997.wcYpao.rst‎
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+Fixed a crash in :mod:`io` buffered streams when ``detach()`` is called
+reentrantly during buffered operations. The affected operations now raise
+``ValueError`` instead of dereferencing a stale raw stream pointer.
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	+Fixed a crash in :mod:`io` buffered streams when ``detach()`` is called
	`2`	`+reentrantly during buffered operations. The affected operations now raise`
	`3`	+``ValueError`` instead of dereferencing a stale raw stream pointer.