From f4bd5e7ef54f40c6c67095c04da0177e92dc0faf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mert=20D=C3=B6ner?= <mertdoner09@gmail.com>
Date: Mon, 1 Jun 2026 20:06:05 +0300
Subject: [PATCH] fix: guard silent chat trim to avoid OOB write

---
 src/core/managers/chat_manager.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/managers/chat_manager.cpp b/src/core/managers/chat_manager.cpp
index 0811b36aa..705f358d4 100644
--- a/src/core/managers/chat_manager.cpp
+++ b/src/core/managers/chat_manager.cpp
@@ -70,7 +70,11 @@ void DetourHostSay(CEntityInstance* pController, CCommand& args, bool teamonly,
         char* pszMessage = (char*)(args.ArgS() + prefix.length() + 1);
 
         // Trailing slashes are only removed if Host_Say has been called.
-        if (bSilent) pszMessage[V_strlen(pszMessage) - 1] = 0;
+        if (bSilent){
+            const auto len = V_strlen(pszMessage);
+            if (len > 0) { pszMessage[len - 1] = 0;}
+        }
+
 
         CCommand args;
         args.Tokenize(pszMessage);