static int asf_read_value(AVFormatContext *s, const uint8_t *name,
                          uint16_t val_len, int type, AVDictionary **met)
{
    int ret;
    uint8_t *value;
    uint16_t buflen = 2 * val_len + 1;
    AVIOContext *pb = s->pb;

    value = av_malloc(buflen);
    if (!value)
        return AVERROR(ENOMEM);
    if (type == ASF_UNICODE) {
        if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
            goto failed;
        if (av_dict_set(met, name, value, 0) < 0)
            av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
    } else {
        char buf[256];
        if (val_len > sizeof(buf)) {
            ret = AVERROR_INVALIDDATA;
            goto failed;
        }
        if ((ret = avio_read(pb, value, val_len)) < 0)
            goto failed;
        if (ret < 2 * val_len)
            value[ret] = '\0';
        else
            value[2 * val_len - 1] = '\0';
        snprintf(buf, sizeof(buf), "%s", value);
        if (av_dict_set(met, name, buf, 0) < 0)
            av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
    }
    av_freep(&value);

    return 0;

failed:
    av_freep(&value);
    return ret;
}

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.