diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13ed75c..573b7eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -112,6 +112,8 @@
    `tranferFlag` is `AcknowledgementOnly`, the value `eventIDToAcknowledge`
    should be the previously retrieved eventID (from the PLDM terminus).
 
+4. dsp: platform: Prevent overflow of arithmetic on event_data_length
+
 ## [0.9.1] - 2024-09-07
 
 ### Changed
diff --git a/src/dsp/platform.c b/src/dsp/platform.c
index 7cf5853..850ed71 100644
--- a/src/dsp/platform.c
+++ b/src/dsp/platform.c
@@ -1296,6 +1296,11 @@
 		return PLDM_ERROR_INVALID_DATA;
 	}
 
+	if ((SIZE_MAX - PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES) <
+	    event_data_length) {
+		return PLDM_ERROR_INVALID_LENGTH;
+	}
+
 	if (payload_length !=
 	    PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES + event_data_length) {
 		return PLDM_ERROR_INVALID_LENGTH;