void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
                      const unsigned char *in, int inl)
{
    int i, j;
    unsigned int total = 0;

    *outl = 0;
     if (inl <= 0)
         return;
     OPENSSL_assert(ctx->length <= (int)sizeof(ctx->enc_data));
    if ((ctx->num + inl) < ctx->length) {
         memcpy(&(ctx->enc_data[ctx->num]), in, inl);
         ctx->num += inl;
         return;
    }
    if (ctx->num != 0) {
        i = ctx->length - ctx->num;
        memcpy(&(ctx->enc_data[ctx->num]), in, i);
        in += i;
        inl -= i;
        j = EVP_EncodeBlock(out, ctx->enc_data, ctx->length);
        ctx->num = 0;
        out += j;
        *(out++) = '\n';
        *out = '\0';
        total = j + 1;
    }
    while (inl >= ctx->length) {
        j = EVP_EncodeBlock(out, in, ctx->length);
        in += ctx->length;
        inl -= ctx->length;
        out += j;
        *(out++) = '\n';
        *out = '\0';
        total += j + 1;
    }
    if (inl != 0)
        memcpy(&(ctx->enc_data[0]), in, inl);
    ctx->num = inl;
    *outl = total;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.