diff --git a/libavcodec/iff.c b/libavcodec/iff.c
index f82141d2e7..d826e78089 100644
--- a/libavcodec/iff.c
+++ b/libavcodec/iff.c
@@ -1354,6 +1354,9 @@ static void decode_delta_d(uint8_t *dst,
         bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
 
         entries = bytestream2_get_be32(&gb);
+        if (entries * 8LL > bytestream2_get_bytes_left(&gb))
+            return;
+
         while (entries && bytestream2_get_bytes_left(&gb) >= 8) {
             int32_t opcode  = bytestream2_get_be32(&gb);
             unsigned offset = bytestream2_get_be32(&gb);