1 files changed, 9 insertions, 1 deletions
diff --git a/Python/thread_pthread.h b/Python/thread_pthread.h
index d9f7c76f2a..27e0dc84bc 100644
--- a/Python/thread_pthread.h
+++ b/Python/thread_pthread.h
@@ -608,7 +608,15 @@ PyThread_create_key(void)
 {
     pthread_key_t key;
     int fail = pthread_key_create(&key, NULL);
-    return fail ? -1 : key;
+    if (fail)
+        return -1;
+    if (key > INT_MAX) {
+        /* Issue #22206: handle integer overflow */
+        pthread_key_delete(key);
+        errno = ENOMEM;
+        return -1;
+    }
+    return (int)key;
 }
 
 void