diff --git a/src/drivers/gnss/septentrio/sbf/decoder.cpp b/src/drivers/gnss/septentrio/sbf/decoder.cpp
index 318a5c4db9..33f180a159 100644
--- a/src/drivers/gnss/septentrio/sbf/decoder.cpp
+++ b/src/drivers/gnss/septentrio/sbf/decoder.cpp
@@ -243,7 +243,7 @@ bool Decoder::done() const
 
 bool Decoder::can_parse() const
 {
-	return done()
+	return done() && _message.header.length <= sizeof(_message)
 	       && _message.header.crc == buffer_crc16(reinterpret_cast<const uint8_t *>(&_message) + 4, _message.header.length - 4);
 }