diff --git a/libavformat/mov.c b/libavformat/mov.c
index 11bcff035c89be9d2546cad9bf4508869864669f..5c9f85c738da6678e74eb99ba921f26985a20a4b 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1911,6 +1911,12 @@ static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     avio_rb24(pb); /* flags */
     entries = avio_rb32(pb);
 
+    if (sc->extradata) {
+        av_log(c->fc, AV_LOG_ERROR,
+               "Duplicate stsd found in this track.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
     /* Prepare space for hosting multiple extradata. */
     sc->extradata = av_mallocz_array(entries, sizeof(*sc->extradata));
     if (!sc->extradata)