From 6ffb5630844db2a7074258bd95609efa5edd73c2 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Sun, 29 Oct 2023 12:55:07 +0100
Subject: imgtool: check for unrecognized options (#11671)

---
 src/tools/imgtool/main.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tools/imgtool/main.cpp b/src/tools/imgtool/main.cpp
index 8dd6affbc43..9777a8b35f8 100644
--- a/src/tools/imgtool/main.cpp
+++ b/src/tools/imgtool/main.cpp
@@ -115,6 +115,9 @@ static int parse_options(int argc, char *argv[], int minunnamed, int maxunnamed,
 					goto error; /* Too few unnamed */
 
 				util::option_resolution::entry *entry = resolution->find(name);
+				if (entry == nullptr)
+					goto error; /* Unknown option */
+
 				if (entry->option_type() == util::option_guide::entry::option_type::ENUM_BEGIN)
 				{
 					const util::option_guide::entry *enum_value;
-- 
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