From 22893f3291fec0bf5eb7e3a48e976a1df2f79ae1 Mon Sep 17 00:00:00 2001
From: Krishna-web-hub <masterkiran27@gmail.com>
Date: Sun, 8 Feb 2026 01:24:50 +0530
Subject: [PATCH 1/2] pickle: validate slotstate type in load_build

---
 Lib/pickle.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Lib/pickle.py b/Lib/pickle.py
index 3e7cf25cb05337..10016dae71fd80 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -1876,8 +1876,10 @@ def load_build(self):
                     inst_dict[intern(k)] = v
                 else:
                     inst_dict[k] = v
-        if slotstate:
-            for k, v in slotstate.items():
+        if slotstate is not None:
+             if not isinstance(slotstate, dict):
+                raise UnpicklingError("slot state is not a dictionary")
+             for k, v in slotstate.items():
                 setattr(inst, k, v)
     dispatch[BUILD[0]] = load_build
 

From 213c0e01d1c4a4e3829e48dd25d4316e90b7bc61 Mon Sep 17 00:00:00 2001
From: Krishna-web-hub <masterkiran27@gmail.com>
Date: Sun, 8 Feb 2026 05:15:57 +0530
Subject: [PATCH 2/2] gh-144411: Validate slotstate type in pickle.load_build()

---
 .../next/Library/2026-02-08-05-15-15.gh-issue-144411.5SLrNj.rst | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2026-02-08-05-15-15.gh-issue-144411.5SLrNj.rst

diff --git a/Misc/NEWS.d/next/Library/2026-02-08-05-15-15.gh-issue-144411.5SLrNj.rst b/Misc/NEWS.d/next/Library/2026-02-08-05-15-15.gh-issue-144411.5SLrNj.rst
new file mode 100644
index 00000000000000..dfef4815b1b4dd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-02-08-05-15-15.gh-issue-144411.5SLrNj.rst
@@ -0,0 +1,2 @@
+Fixed an inconsistency between the pure-Python and C pickle implementations
+when handling invalid slot state during unpickling.