static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
{
    ASFContext *asf = s->priv_data;
    AVIOContext *pb = s->pb;
    uint64_t size   = asf->data_size = avio_rl64(pb);
    int i;

    if (!asf->data_reached) {
        asf->data_reached       = 1;
        asf->data_offset        = asf->offset;
    }

    for (i = 0; i < asf->nb_streams; i++) {
        if (!(asf->b_flags & ASF_FLAG_BROADCAST))
            s->streams[i]->duration = asf->duration;
    }
    asf->nb_mult_left           = 0;
    asf->sub_left               = 0;
    asf->state                  = PARSE_PACKET_HEADER;
    asf->return_subpayload      = 0;
    asf->packet_size_internal   = 0;
    avio_skip(pb, 16); // skip File ID
    size = avio_rl64(pb); // Total Data Packets
    if (size != asf->nb_packets)
        av_log(s, AV_LOG_WARNING,
               "Number of Packets from File Properties Object is not equal to Total"
               "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
               size, asf->nb_packets);
    avio_skip(pb, 2); // skip reserved field
    asf->first_packet_offset = avio_tell(pb);
    if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
        align_position(pb, asf->offset, asf->data_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.