diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 981dd8cf0d..6007605b87 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -2412,7 +2412,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
             // something else is broken, exit the program_descriptors_loop
             break;
         program_info_length -= len;
-        if (tag == IOD_DESCRIPTOR) {
+        if (tag == IOD_DESCRIPTOR && len >= 2) {
             get8(&p, p_end); // scope
             get8(&p, p_end); // label
             len -= 2;