static int prepare_sdp_description(FFServerStream *stream, uint8_t **pbuffer,
                                   struct in_addr my_ip)
{
    AVFormatContext *avc;
    AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
    AVDictionaryEntry *entry = av_dict_get(stream->metadata, "title", NULL, 0);
    int i;

    *pbuffer = NULL;

    avc =  avformat_alloc_context();
    if (!avc || !rtp_format)
        return -1;

    avc->oformat = rtp_format;
    av_dict_set(&avc->metadata, "title",
                entry ? entry->value : "No Title", 0);
    if (stream->is_multicast) {
        snprintf(avc->filename, 1024, "rtp://%s:%d?multicast=1?ttl=%d",
                 inet_ntoa(stream->multicast_ip),
                 stream->multicast_port, stream->multicast_ttl);
    } else
        snprintf(avc->filename, 1024, "rtp://0.0.0.0");

    for(i = 0; i < stream->nb_streams; i++) {
        AVStream *st = avformat_new_stream(avc, NULL);
        if (!st)
            goto sdp_done;
        avcodec_parameters_from_context(stream->streams[i]->codecpar, stream->streams[i]->codec);
        unlayer_stream(st, stream->streams[i]);
    }
#define PBUFFER_SIZE 2048
    *pbuffer = av_mallocz(PBUFFER_SIZE);
    if (!*pbuffer)
        goto sdp_done;
    av_sdp_create(&avc, 1, *pbuffer, PBUFFER_SIZE);

 sdp_done:
    av_freep(&avc->streams);
    av_dict_free(&avc->metadata);
    av_free(avc);

    return *pbuffer ? strlen(*pbuffer) : AVERROR(ENOMEM);
}

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.