diff --git a/src/grib_accessor_class_bufr_extract_area_subsets.c b/src/grib_accessor_class_bufr_extract_area_subsets.c
index 6de896c93..b3bdec849 100644
--- a/src/grib_accessor_class_bufr_extract_area_subsets.c
+++ b/src/grib_accessor_class_bufr_extract_area_subsets.c
@@ -313,6 +313,7 @@ static int select_area(grib_accessor* a)
     if (nsubsets != 0) {
         subsets_ar = grib_iarray_get_array(subsets);
         ret        = grib_set_long_array(h, self->extractSubsetList, subsets_ar, nsubsets);
+        grib_context_free(c, subsets_ar);
         if (ret)
             return ret;
 
diff --git a/src/grib_accessor_class_bufr_extract_datetime_subsets.c b/src/grib_accessor_class_bufr_extract_datetime_subsets.c
index a8dd2ffb0..b4e9642e3 100644
--- a/src/grib_accessor_class_bufr_extract_datetime_subsets.c
+++ b/src/grib_accessor_class_bufr_extract_datetime_subsets.c
@@ -443,6 +443,7 @@ static int select_datetime(grib_accessor* a)
     if (nsubsets != 0) {
         subsets_ar = grib_iarray_get_array(subsets);
         ret        = grib_set_long_array(h, self->extractSubsetList, subsets_ar, nsubsets);
+        grib_context_free(c, subsets_ar);
         if (ret)
             return ret;
 
diff --git a/src/grib_accessor_class_bufr_simple_thinning.c b/src/grib_accessor_class_bufr_simple_thinning.c
index 4eb40a384..0cd62f2f4 100644
--- a/src/grib_accessor_class_bufr_simple_thinning.c
+++ b/src/grib_accessor_class_bufr_simple_thinning.c
@@ -207,6 +207,7 @@ static int apply_thinning(grib_accessor* a)
         if (nsubsets != 0) {
             subsets_ar = grib_iarray_get_array(subsets);
             ret        = grib_set_long_array(h, self->extractSubsetList, subsets_ar, nsubsets);
+            grib_context_free(c, subsets_ar);
             if (ret)
                 return ret;
 
@@ -218,6 +219,7 @@ static int apply_thinning(grib_accessor* a)
             if (ret)
                 return ret;
         }
+        grib_iarray_delete(subsets);
     }
     else {
         return GRIB_NOT_IMPLEMENTED;
diff --git a/src/grib_expression_class_sub_string.c b/src/grib_expression_class_sub_string.c
index 1b437fa05..688c663a9 100644
--- a/src/grib_expression_class_sub_string.c
+++ b/src/grib_expression_class_sub_string.c
@@ -116,14 +116,17 @@ grib_expression* new_sub_string_expression(grib_context* c, const char* value, s
 
     if (length == 0) {
         grib_context_log(c, GRIB_LOG_ERROR, "Invalid substring: length must be > 0");
+        grib_context_free_persistent(c, e);
         return NULL;
     }
     if (start > slen) { /* to catch a -ve number passed to start */
         grib_context_log(c, GRIB_LOG_ERROR, "Invalid substring: start=%lu", start);
+        grib_context_free_persistent(c, e);
         return NULL;
     }
     if (start + length > slen) {
         grib_context_log(c, GRIB_LOG_ERROR, "Invalid substring: start(=%lu)+length(=%lu) > length('%s'))", start, length, value);
+        grib_context_free_persistent(c, e);
         return NULL;
     }
 
diff --git a/src/grib_handle.c b/src/grib_handle.c
index 66c509592..5ad87dd2a 100644
--- a/src/grib_handle.c
+++ b/src/grib_handle.c
@@ -1440,9 +1440,11 @@ grib_action* grib_action_from_filter(const char* filter)
     grib_action* a        = NULL;
     grib_context* context = grib_context_get_default();
     a                     = grib_parse_file(context, filter);
+
     grib_context_free_persistent(context, context->grib_reader->first->filename);
     grib_context_free_persistent(context, context->grib_reader->first);
     grib_context_free_persistent(context, context->grib_reader);
+
     context->grib_reader  = NULL;
     return a;
 }
diff --git a/src/grib_parse_utils.c b/src/grib_parse_utils.c
index 0b74b16ef..5c0fa1034 100644
--- a/src/grib_parse_utils.c
+++ b/src/grib_parse_utils.c
@@ -351,6 +351,7 @@ int grib_accessors_list_print(grib_handle* h, grib_accessors_list* al, const cha
                         *newline = 1;
                         cols     = 0;
                     }
+                    grib_context_free(h->context, cvals[i]);
                 }
             }
             grib_context_free(h->context, cvals);
@@ -485,6 +486,7 @@ int grib_recompose_print(grib_handle* h, grib_accessor* observer, const char* un
                 case ']':
                     loc[mode] = 0;
                     mode      = -1;
+                    if(al) grib_accessors_list_delete(h->context, al);
                     al        = grib_find_accessors_list(h, loc); /* This allocates memory */
                     if (!al) {
                         if (!fail) {
diff --git a/tests/lsan-leap42.supp b/tests/lsan-leap42.supp
index 48b5278e3..c7a7db335 100644
--- a/tests/lsan-leap42.supp
+++ b/tests/lsan-leap42.supp
@@ -1,7 +1,6 @@
-leak:tools/grib_filter.c
-leak:tools/bufr_filter.c
-leak:tools/bufr_dump.c
+leak:process_elements
 leak:tools/bufr_compare.c
 leak:tools/gts_filter.c
 leak:src/action_class_rename.c
 leak:tools/grib_to_netcdf.c
+leak:tests/bufr_ecc-517.c