diff --git a/libavformat/ty.c b/libavformat/ty.c
index c5ea4bf98d..a2440c6293 100644
--- a/libavformat/ty.c
+++ b/libavformat/ty.c
@@ -393,12 +393,16 @@ static int demux_video(AVFormatContext *s, TyRecHdr *rec_hdr, AVPacket *pkt)
     int got_packet = 0;
 
     if (subrec_type != 0x02 && subrec_type != 0x0c &&
-        subrec_type != 0x08 && rec_size > 4) {
+        subrec_type != 0x08 && rec_size > 7) {
+
         /* get the PTS from this packet if it has one.
          * on S1, only 0x06 has PES.  On S2, however, most all do.
          * Do NOT Pass the PES Header to the MPEG2 codec */
         es_offset1 = find_es_header(ty_VideoPacket, ty->chunk + ty->cur_chunk_pos, 5);
         if (es_offset1 != -1) {
+            if (rec_size < es_offset1 + VIDEO_PTS_OFFSET + 5)
+                return AVERROR_INVALIDDATA;
+
             ty->last_video_pts = ff_parse_pes_pts(
                     ty->chunk + ty->cur_chunk_pos + es_offset1 + VIDEO_PTS_OFFSET);
             if (subrec_type != 0x06) {