diff --git a/reactos/base/applications/network/tracert/tracert.c b/reactos/base/applications/network/tracert/tracert.c
index 4ec2508fa64..e3c1048f7be 100644
--- a/reactos/base/applications/network/tracert/tracert.c
+++ b/reactos/base/applications/network/tracert/tracert.c
@@ -422,7 +422,7 @@ AllocateBuffers(PAPPINFO pInfo)
 
     pInfo->RecvPacket = (PIPv4_HEADER)HeapAlloc(GetProcessHeap(),
                                                 0,
-                                                sizeof(IPv4_HEADER) + PACKET_SIZE);
+                                                MAX_PING_PACKET_SIZE);
     if (!pInfo->RecvPacket)
     {
         HeapFree(GetProcessHeap(),
diff --git a/reactos/dll/ntdll/ldr/utils.c b/reactos/dll/ntdll/ldr/utils.c
index 30373f35848..1cfb8c85505 100644
--- a/reactos/dll/ntdll/ldr/utils.c
+++ b/reactos/dll/ntdll/ldr/utils.c
@@ -256,7 +256,7 @@ LdrpQueryAppPaths(IN PCWSTR ImageName)
     /* Copy it to the heap allocd memory */
     Path = RtlAllocateHeap(RtlGetProcessHeap(),
                            0,
-                           wcslen(SearchPathBuffer) * sizeof(WCHAR));
+                           (wcslen(SearchPathBuffer) + 1) * sizeof(WCHAR));
 
     if (!Path)
     {
diff --git a/reactos/dll/win32/netcfgx/tcpipconf_notify.c b/reactos/dll/win32/netcfgx/tcpipconf_notify.c
index 14b9a4ab2f4..5238d60c72e 100644
--- a/reactos/dll/win32/netcfgx/tcpipconf_notify.c
+++ b/reactos/dll/win32/netcfgx/tcpipconf_notify.c
@@ -2860,7 +2860,7 @@ Initialize(TcpipConfNotifyImpl * This)
                 }
                 pCurSettings->AutoconfigActive = pPerInfo->AutoconfigActive;
             }
-            CoTaskMemFree(pInfo);
+            CoTaskMemFree(pPerInfo);
         }
     }