diff --git a/src/algorithms/libs/rtklib/rtklib_ephemeris.cc b/src/algorithms/libs/rtklib/rtklib_ephemeris.cc
index 07954f822..7fb213366 100644
--- a/src/algorithms/libs/rtklib/rtklib_ephemeris.cc
+++ b/src/algorithms/libs/rtklib/rtklib_ephemeris.cc
@@ -92,7 +92,7 @@ double var_uraeph(int ura)
             2.4, 3.4, 4.85, 6.85, 9.65, 13.65, 24.0, 48.0, 96.0, 192.0, 384.0, 768.0, 1536.0,
             3072.0, 6144.0
     };
-    return ura < 0 || 15 < ura ? std::pow(6144.0, 2.0) : std::pow(ura_value[ura], 2.0);
+    return ura < 0 || 14 < ura ? std::pow(6144.0, 2.0) : std::pow(ura_value[ura], 2.0);
 }
 
 
diff --git a/src/algorithms/libs/rtklib/rtklib_pntpos.cc b/src/algorithms/libs/rtklib/rtklib_pntpos.cc
index 1f95ba32f..6bf14c19e 100644
--- a/src/algorithms/libs/rtklib/rtklib_pntpos.cc
+++ b/src/algorithms/libs/rtklib/rtklib_pntpos.cc
@@ -364,7 +364,8 @@ int valsol(const double *azel, const int *vsat, int n,
         const prcopt_t *opt, const double *v, int nv, int nx,
         char *msg)
 {
-    double azels[MAXOBS*2], dop[4], vv;
+    double azels[MAXOBS*2] = {0};
+    double dop[4], vv;
     int i, ns;
 
     trace(3, "valsol  : n=%d nv=%d\n", n, nv);
diff --git a/src/algorithms/libs/rtklib/rtklib_ppp.cc b/src/algorithms/libs/rtklib/rtklib_ppp.cc
index 5fe24ed68..2b606f07e 100644
--- a/src/algorithms/libs/rtklib/rtklib_ppp.cc
+++ b/src/algorithms/libs/rtklib/rtklib_ppp.cc
@@ -461,7 +461,11 @@ int fix_amb_ILS(rtk_t *rtk, int *sat1, int *sat2, int *NW, int n)
             sat2[m] = sat2[i];
             NW[m++] = NW[i];
         }
-    if (m<3) return 0;
+    if (m<3)
+        {
+            free(B1); free(N1); free(D); free(E); free(Q); free(NC);
+            return 0;
+        }
 
     /* covariance of narrow-lane ambiguities */
     matmul("TN", m, rtk->nx, rtk->nx, 1.0, D, rtk->P, 0.0, E);
@@ -471,9 +475,14 @@ int fix_amb_ILS(rtk_t *rtk, int *sat1, int *sat2, int *NW, int n)
     if ((info = lambda(m, 2, B1, Q, N1, s)))
         {
             trace(2, "lambda error: info=%d\n", info);
+            free(B1); free(N1); free(D); free(E); free(Q); free(NC);
+            return 0;
+        }
+    if (s[0] <= 0.0)
+        {
+            free(B1); free(N1); free(D); free(E); free(Q); free(NC);
             return 0;
         }
-    if (s[0] <= 0.0) return 0;
 
     rtk->sol.ratio = (float)(MIN_PPP(s[1]/s[0], 999.9));
 
diff --git a/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc b/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc
index ea6d31f5d..d9eed2887 100644
--- a/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc
+++ b/src/algorithms/libs/rtklib/rtklib_rtkcmn.cc
@@ -3234,12 +3234,12 @@ void createdir(const char *path)
     char buff[1024], *p;
     //tracet(3, "createdir: path=%s\n", path);
 
-    strcpy(buff, path);
+    if(strlen(path) < 1025) strcpy(buff, path);
+    else trace(1, "path is too long");
     if (!(p = strrchr(buff, FILEPATHSEP))) return;
     *p = '\0';
 
-    if(mkdir(buff, 0777) == 0) {}
-    else trace(1, "Error creating folder");
+    if(mkdir(buff, 0777) != 0) trace(1, "Error creating folder");
 }
 
 
@@ -3257,7 +3257,9 @@ int repstr(char *str, const char *pat, const char *rep)
             r += sprintf(r, "%s", rep);
         }
     if (p <= str) return 0;
-    strcpy(r, p);
+
+    if(strlen(p) < 1025 ) strcpy(r, p);
+    else trace(1, "pat array is too long");
     strcpy(str, buff);
     return 1;
 }
@@ -3945,7 +3947,8 @@ int rtk_uncompress(const char *file, char *uncfile)
 
     trace(3, "rtk_uncompress: file=%s\n", file);
 
-    strcpy(tmpfile, file);
+    if(strlen(file) < 1025) strcpy(tmpfile, file);
+    else trace(1, "file array is too long");
     if (!(p = strrchr(tmpfile, '.'))) return 0;
 
     /* uncompress by gzip */
diff --git a/src/algorithms/libs/rtklib/rtklib_solution.cc b/src/algorithms/libs/rtklib/rtklib_solution.cc
index 82f804305..d4bf306fc 100644
--- a/src/algorithms/libs/rtklib/rtklib_solution.cc
+++ b/src/algorithms/libs/rtklib/rtklib_solution.cc
@@ -271,7 +271,7 @@ int decode_nmeagga(char **val, int n, sol_t *sol)
 /* decode nmea ---------------------------------------------------------------*/
 int decode_nmea(char *buff, sol_t *sol)
 {
-    char *p,*q,*val[MAXFIELD];
+    char *p, *q, *val[MAXFIELD] = {0};
     int n = 0;
 
     trace(4,"decode_nmea: buff=%s\n",buff);