static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
    AVStream *st;

    if (c->fc->nb_streams < 1)
        return 0;
    st = c->fc->streams[c->fc->nb_streams-1];

    if ((uint64_t)atom.size > (1<<30))
        return AVERROR_INVALIDDATA;

    if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) {
        av_free(st->codec->extradata);
        st->codec->extradata_size = 0;
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
        if (!st->codec->extradata)
            return AVERROR(ENOMEM);
        st->codec->extradata_size = atom.size;
        avio_read(pb, st->codec->extradata, atom.size);
    } else if (atom.size > 8) { /* to read frma, esds atoms */
        int ret;
        if ((ret = mov_read_default(c, pb, atom)) < 0)
            return ret;
    } else
        avio_skip(pb, atom.size);
    return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.