From 66e4e40bffc41a1e3a0a9c2cc61280be5a8e1867 Mon Sep 17 00:00:00 2001
From: Crsky <crskycode@hotmail.com>
Date: Mon, 2 Feb 2026 20:01:10 +0800
Subject: [PATCH] fix: Add offset check

---
 ArcFormats/Edoire/ArcARC.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ArcFormats/Edoire/ArcARC.cs b/ArcFormats/Edoire/ArcARC.cs
index ce664846..2468e724 100644
--- a/ArcFormats/Edoire/ArcARC.cs
+++ b/ArcFormats/Edoire/ArcARC.cs
@@ -49,7 +49,7 @@ namespace GameRes.Formats.Edoire
             if (!file.View.AsciiEqual (0, "@ARCH000"))
                 return null;
             var index_offset = file.View.ReadInt64 (file.MaxOffset-8);
-            if (index_offset >= file.MaxOffset-12)
+            if (index_offset <= 0 || index_offset >= file.MaxOffset-12)
                 return null;
             var count = file.View.ReadInt32 (index_offset);
             if (!IsSaneCount (count))