diff --git a/drivers/ufs/core/ufs-rpmb.c b/drivers/ufs/core/ufs-rpmb.c
index ffad049872b9..431f85b36876 100644
--- a/drivers/ufs/core/ufs-rpmb.c
+++ b/drivers/ufs/core/ufs-rpmb.c
@@ -69,6 +69,10 @@ static int ufs_rpmb_route_frames(struct device *dev, u8 *req, unsigned int req_l
 
 	hba = ufs_rpmb->hba;
 
+	/* req_resp is at the end of an RPMB frame. */
+	if (req_len < sizeof(*frm_out))
+		return -EINVAL;
+
 	req_type = be16_to_cpu(frm_out->req_resp);
 
 	switch (req_type) {