diff --git a/SOURCES/swig-3.0.12-Add-missing-checks-for-failures-in-calls-to-PyUnicod.patch b/SOURCES/swig-3.0.12-Add-missing-checks-for-failures-in-calls-to-PyUnicod.patch
new file mode 100644
index 0000000..7050452
--- /dev/null
+++ b/SOURCES/swig-3.0.12-Add-missing-checks-for-failures-in-calls-to-PyUnicod.patch
@@ -0,0 +1,346 @@
+From b0e29fbdf31bb94b11cb8a7cc830b4a76467afa3 Mon Sep 17 00:00:00 2001
+From: William S Fulton <wsf@fultondesigns.co.uk>
+Date: Mon, 4 Dec 2017 18:41:55 +0000
+Subject: [PATCH] Add missing checks for failures in calls to
+ PyUnicode_AsUTF8String.
+
+Previously a seg fault could occur when passing invalid UTF8 strings (low
+surrogates), eg passing u"\udcff" to the C layer (Python 3).
+---
+ CHANGES.current                               |  8 ++++++-
+ Doc/Manual/Python.html                        | 22 ++++++++++++++++---
+ Doc/Manual/Varargs.html                       |  5 ++++-
+ Examples/python/multimap/example.i            | 12 +++++++++-
+ .../python/unicode_strings_runme.py           | 10 +++++++++
+ Examples/test-suite/python_varargs_typemap.i  |  5 ++++-
+ Examples/test-suite/unicode_strings.i         |  2 ++
+ Lib/python/pyerrors.swg                       | 11 ++++++----
+ Lib/python/pyhead.swg                         | 16 ++++++++------
+ Lib/python/pyinit.swg                         |  4 ++--
+ Lib/python/pyrun.swg                          | 10 ++++++---
+ Lib/python/pystrings.swg                      | 12 ++++++++--
+ 12 files changed, 92 insertions(+), 25 deletions(-)
+
+#diff --git a/CHANGES.current b/CHANGES.current
+#index 5cab80172..06b958f18 100644
+#--- a/CHANGES.current
+#+++ b/CHANGES.current
+#@@ -6,8 +6,14 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
+# 
+# Version 4.0.0 (in progress)
+# ===========================
+#+
+#+2017-12-04: wsfulton
+#+            [Python] Add missing checks for failures in calls to PyUnicode_AsUTF8String. Previously a 
+#+            seg fault could occur when passing invalid UTF8 strings (low surrogates), eg passing
+#+            u"\udcff" to the C layer (Python 3).
+#+
+# 2017-11-24: joequant
+#-	    Fix github #1124 and return R_NilValue for null pointers
+#+	    Fix #1124 and return R_NilValue for null pointers
+# 
+# 2017-11-29: wsfulton
+#             [Java] director exception handling improvements.
+#diff --git a/Doc/Manual/Python.html b/Doc/Manual/Python.html
+#index 0c0023dea..27ce084bd 100644
+#--- a/Doc/Manual/Python.html
+#+++ b/Doc/Manual/Python.html
+#@@ -6521,14 +6521,16 @@ string that cannot be completely decoded as UTF-8:
+# <div class="code"><pre>
+# %module example
+# 
+#-%include &lt;std_string.i&gt;
+#-
+# %inline %{
+# 
+#-const char* non_utf8_c_str(void) {
+#+const char * non_utf8_c_str(void) {
+#   return "h\xe9llo w\xc3\xb6rld";
+# }
+# 
+#+void instring(const char *s) {
+#+  ...
+#+}
+#+
+# %}
+# </pre></div>
+# 
+#@@ -6590,6 +6592,20 @@ For more details about the <tt>surrogateescape</tt> error handler, please see
+# <a href="https://www.python.org/dev/peps/pep-0383/">PEP 383</a>.
+# </p>
+# 
+#+<p>
+#+When Python 3 strings are passed to the C/C++ layer, they are expected to be valid UTF8 Unicode strings too.
+#+For example, when the <tt>instring</tt> method above is wrapped and called, any invalid UTF8 Unicode code strings
+#+will result in a TypeError because the attempted conversion fails:
+#+</p>
+#+
+#+<div class="targetlang"><pre>
+#+&gt;&gt;&gt; example.instring('h\xe9llo')
+#+&gt;&gt;&gt; example.instring('h\udce9llo')
+#+Traceback (most recent call last):
+#+  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
+#+TypeError: in method 'instring', argument 1 of type 'char const *'
+#+</pre></div>
+#+
+# <p>
+# In some cases, users may wish to instead handle all byte strings as bytes
+# objects in Python 3. This can be accomplished by adding
+#diff --git a/Doc/Manual/Varargs.html b/Doc/Manual/Varargs.html
+#index eba816382..014a38cae 100644
+#--- a/Doc/Manual/Varargs.html
+#+++ b/Doc/Manual/Varargs.html
+#@@ -529,8 +529,11 @@ like this:
+#       SWIG_fail;
+#     }
+#     pystr = PyUnicode_AsUTF8String(pyobj);
+#+    if (!pystr) {
+#+      SWIG_fail;
+#+    }
+#     str = strdup(PyBytes_AsString(pystr));
+#-    Py_XDECREF(pystr);
+#+    Py_DECREF(pystr);
+# %#else  
+#     if (!PyString_Check(pyobj)) {
+#       PyErr_SetString(PyExc_ValueError, "Expected a string");
+diff --git a/Examples/python/multimap/example.i b/Examples/python/multimap/example.i
+index 66c0f74c6..3ff5d52c0 100644
+--- a/Examples/python/multimap/example.i
++++ b/Examples/python/multimap/example.i
+@@ -39,7 +39,11 @@ extern int    gcd(int x, int y);
+ %#if PY_VERSION_HEX >= 0x03000000
+     {
+       PyObject *utf8str = PyUnicode_AsUTF8String(s);
+-      const char *cstr = PyBytes_AsString(utf8str);
++      const char *cstr;
++      if (!utf8str) {
++        SWIG_fail;
++      }
++      cstr = PyBytes_AsString(utf8str);
+       $2[i] = strdup(cstr);
+       Py_DECREF(utf8str);
+     }
+@@ -72,6 +76,9 @@ extern int gcdmain(int argc, char *argv[]);
+     SWIG_fail;
+   }
+   utf8str = PyUnicode_AsUTF8String($input);
++  if (!utf8str) {
++    SWIG_fail;
++  }
+   PyBytes_AsStringAndSize(utf8str, &cstr, &len);
+   $1 = strncpy((char *)malloc(len+1), cstr, (size_t)len);
+   $2 = (int)len;
+@@ -105,6 +112,9 @@ extern int count(char *bytes, int len, char c);
+   char *cstr;
+   Py_ssize_t len;
+   PyObject *utf8str = PyUnicode_AsUTF8String($input);
++  if (!utf8str) {
++    SWIG_fail;
++  }
+   PyBytes_AsStringAndSize(utf8str, &cstr, &len);
+   $1 = strncpy((char *)malloc(len+1), cstr, (size_t)len);
+   $2 = (int)len;
+diff --git a/Examples/test-suite/python/unicode_strings_runme.py b/Examples/test-suite/python/unicode_strings_runme.py
+index fa9c51437..39e93b0fc 100644
+--- a/Examples/test-suite/python/unicode_strings_runme.py
++++ b/Examples/test-suite/python/unicode_strings_runme.py
+@@ -25,3 +25,13 @@ if sys.version_info[0:2] < (3, 0):
+     check(unicode_strings.charstring(unicode("hello4")), "hello4")
+     unicode_strings.charstring(u"hell\xb05")
+     unicode_strings.charstring(u"hell\u00f66")
++
++low_surrogate_string = u"\udcff"
++try:
++    unicode_strings.instring(low_surrogate_string)
++    # Will succeed with Python 2
++except TypeError, e:
++    # Python 3 will fail the PyUnicode_AsUTF8String conversion resulting in a TypeError.
++    # The real error is actually:
++    # UnicodeEncodeError: 'utf-8' codec can't encode character '\udcff' in position 0: surrogates not allowed
++    pass
+diff --git a/Examples/test-suite/python_varargs_typemap.i b/Examples/test-suite/python_varargs_typemap.i
+index f05fb98eb..d809bf1fa 100644
+--- a/Examples/test-suite/python_varargs_typemap.i
++++ b/Examples/test-suite/python_varargs_typemap.i
+@@ -23,8 +23,11 @@
+        SWIG_fail;
+     }
+     pystr = PyUnicode_AsUTF8String(pyobj);
++    if (!pystr) {
++      SWIG_fail;
++    }
+     str = strdup(PyBytes_AsString(pystr));
+-    Py_XDECREF(pystr);
++    Py_DECREF(pystr);
+ %#else  
+     if (!PyString_Check(pyobj)) {
+        PyErr_SetString(PyExc_ValueError, "Expected a string");
+diff --git a/Examples/test-suite/unicode_strings.i b/Examples/test-suite/unicode_strings.i
+index 9be3748e6..e7266266e 100644
+--- a/Examples/test-suite/unicode_strings.i
++++ b/Examples/test-suite/unicode_strings.i
+@@ -20,4 +20,6 @@ char *charstring(char *s) {
+   return s;
+ }
+ 
++void instring(const char *s) {
++}
+ %}
+diff --git a/Lib/python/pyerrors.swg b/Lib/python/pyerrors.swg
+index fe7313554..463afae15 100644
+--- a/Lib/python/pyerrors.swg
++++ b/Lib/python/pyerrors.swg
+@@ -53,14 +53,17 @@ SWIG_Python_AddErrorMsg(const char* mesg)
+   PyObject *value = 0;
+   PyObject *traceback = 0;
+ 
+-  if (PyErr_Occurred()) PyErr_Fetch(&type, &value, &traceback);
++  if (PyErr_Occurred())
++    PyErr_Fetch(&type, &value, &traceback);
+   if (value) {
+-    char *tmp;
+     PyObject *old_str = PyObject_Str(value);
++    const char *tmp = SWIG_Python_str_AsChar(old_str);
+     PyErr_Clear();
+     Py_XINCREF(type);
+-
+-    PyErr_Format(type, "%s %s", tmp = SWIG_Python_str_AsChar(old_str), mesg);
++    if (tmp)
++      PyErr_Format(type, "%s %s", tmp, mesg);
++    else
++      PyErr_Format(type, "%s", mesg);
+     SWIG_Python_str_DelForPy3(tmp);
+     Py_DECREF(old_str);
+     Py_DECREF(value);
+diff --git a/Lib/python/pyhead.swg b/Lib/python/pyhead.swg
+index 55eb95a6d..2fa8b5b4c 100644
+--- a/Lib/python/pyhead.swg
++++ b/Lib/python/pyhead.swg
+@@ -38,14 +38,16 @@ SWIGINTERN char*
+ SWIG_Python_str_AsChar(PyObject *str)
+ {
+ #if PY_VERSION_HEX >= 0x03000000
+-  char *cstr;
+-  char *newstr;
+-  Py_ssize_t len;
++  char *newstr = 0;
+   str = PyUnicode_AsUTF8String(str);
+-  PyBytes_AsStringAndSize(str, &cstr, &len);
+-  newstr = (char *) malloc(len+1);
+-  memcpy(newstr, cstr, len+1);
+-  Py_XDECREF(str);
++  if (str) {
++    char *cstr;
++    Py_ssize_t len;
++    PyBytes_AsStringAndSize(str, &cstr, &len);
++    newstr = (char *) malloc(len+1);
++    memcpy(newstr, cstr, len+1);
++    Py_XDECREF(str);
++  }
+   return newstr;
+ #else
+   return PyString_AsString(str);
+diff --git a/Lib/python/pyinit.swg b/Lib/python/pyinit.swg
+index fe45ac941..826f8411b 100644
+--- a/Lib/python/pyinit.swg
++++ b/Lib/python/pyinit.swg
+@@ -84,10 +84,10 @@ swig_varlink_str(swig_varlinkobject *v) {
+ 
+ SWIGINTERN int
+ swig_varlink_print(swig_varlinkobject *v, FILE *fp, int SWIGUNUSEDPARM(flags)) {
+-  char *tmp;
+   PyObject *str = swig_varlink_str(v);
++  const char *tmp = SWIG_Python_str_AsChar(str);
+   fprintf(fp,"Swig global variables ");
+-  fprintf(fp,"%s\n", tmp = SWIG_Python_str_AsChar(str));
++  fprintf(fp,"%s\n", tmp ? tmp : "Invalid global variable");
+   SWIG_Python_str_DelForPy3(tmp);
+   Py_DECREF(str);
+   return 0;
+diff --git a/Lib/python/pyrun.swg b/Lib/python/pyrun.swg
+index efc476613..430d3af18 100644
+--- a/Lib/python/pyrun.swg
++++ b/Lib/python/pyrun.swg
+@@ -1672,14 +1672,16 @@ SWIG_Python_AddErrMesg(const char* mesg, int infront)
+     PyObject *traceback = 0;
+     PyErr_Fetch(&type, &value, &traceback);
+     if (value) {
+-      char *tmp;
+       PyObject *old_str = PyObject_Str(value);
++      const char *tmp = SWIG_Python_str_AsChar(old_str);
++      if (!tmp)
++        tmp = "Invalid error message";
+       Py_XINCREF(type);
+       PyErr_Clear();
+       if (infront) {
+-	PyErr_Format(type, "%s %s", mesg, tmp = SWIG_Python_str_AsChar(old_str));
++	PyErr_Format(type, "%s %s", mesg, tmp);
+       } else {
+-	PyErr_Format(type, "%s %s", tmp = SWIG_Python_str_AsChar(old_str), mesg);
++	PyErr_Format(type, "%s %s", tmp, mesg);
+       }
+       SWIG_Python_str_DelForPy3(tmp);
+       Py_DECREF(old_str);
+@@ -1805,6 +1807,8 @@ SWIG_Python_NonDynamicSetAttr(PyObject *obj, PyObject *name, PyObject *value) {
+       Py_INCREF(name);
+     } else {
+       encoded_name = PyUnicode_AsUTF8String(name);
++      if (!encoded_name)
++        return -1;
+     }
+     PyErr_Format(PyExc_AttributeError, "'%.100s' object has no attribute '%.200s'", tp->tp_name, PyString_AsString(encoded_name));
+     Py_DECREF(encoded_name);
+diff --git a/Lib/python/pystrings.swg b/Lib/python/pystrings.swg
+index fd37855eb..301e0f3e1 100644
+--- a/Lib/python/pystrings.swg
++++ b/Lib/python/pystrings.swg
+@@ -16,6 +16,7 @@ SWIG_AsCharPtrAndSize(PyObject *obj, char** cptr, size_t* psize, int *alloc)
+ %#endif
+   {
+     char *cstr; Py_ssize_t len;
++    int ret = SWIG_OK;
+ %#if PY_VERSION_HEX>=0x03000000
+ %#if !defined(SWIG_PYTHON_STRICT_BYTE_CHAR)
+     if (!alloc && cptr) {
+@@ -26,7 +27,10 @@ SWIG_AsCharPtrAndSize(PyObject *obj, char** cptr, size_t* psize, int *alloc)
+         return SWIG_RuntimeError;
+     }
+     obj = PyUnicode_AsUTF8String(obj);
+-    if(alloc) *alloc = SWIG_NEWOBJ;
++    if (!obj)
++      return SWIG_TypeError;
++    if (alloc)
++      *alloc = SWIG_NEWOBJ;
+ %#endif
+     PyBytes_AsStringAndSize(obj, &cstr, &len);
+ %#else
+@@ -64,6 +68,8 @@ SWIG_AsCharPtrAndSize(PyObject *obj, char** cptr, size_t* psize, int *alloc)
+ %#endif
+ %#else
+ 	*cptr = SWIG_Python_str_AsChar(obj);
++        if (!*cptr)
++          ret = SWIG_TypeError;
+ %#endif
+       }
+     }
+@@ -71,7 +77,7 @@ SWIG_AsCharPtrAndSize(PyObject *obj, char** cptr, size_t* psize, int *alloc)
+ %#if PY_VERSION_HEX>=0x03000000 && !defined(SWIG_PYTHON_STRICT_BYTE_CHAR)
+     Py_XDECREF(obj);
+ %#endif
+-    return SWIG_OK;
++    return ret;
+   } else {
+ %#if defined(SWIG_PYTHON_2_UNICODE)
+ %#if defined(SWIG_PYTHON_STRICT_BYTE_CHAR)
+@@ -84,6 +90,8 @@ SWIG_AsCharPtrAndSize(PyObject *obj, char** cptr, size_t* psize, int *alloc)
+         return SWIG_RuntimeError;
+       }
+       obj = PyUnicode_AsUTF8String(obj);
++      if (!obj)
++        return SWIG_TypeError;
+       if (PyString_AsStringAndSize(obj, &cstr, &len) != -1) {
+         if (cptr) {
+           if (alloc) *alloc = SWIG_NEWOBJ;
+-- 
+2.21.1
+
diff --git a/SPECS/swig.spec b/SPECS/swig.spec
index 1e6db3b..c3e19f6 100644
--- a/SPECS/swig.spec
+++ b/SPECS/swig.spec
@@ -34,7 +34,7 @@
 Summary: Connects C/C++/Objective C to some high-level programming languages
 Name:    swig
 Version: 3.0.12
-Release: 18%{?dist}
+Release: 19%{?dist}
 License: GPLv3+ and BSD
 URL:     http://swig.sourceforge.net/
 Source0: http://downloads.sourceforge.net/project/swig/swig/swig-%{version}/swig-%{version}.tar.gz
@@ -61,6 +61,8 @@ Patch7:  swig-3.0.12-Coverity-fix-issue-reported-for-SWIG_Python_FixMetho.patch
 Patch8:  swig-3.0.12-Fix-Coverity-issue-reported-for-setslice-pycontainer.patch
 Patch9:  swig-3.0.12-Coverity-fix-issue-reported-for-wrapper-argument-che.patch
 Patch10: swig-3.0.12-Coverity-fix-issue-reported-for-SWIG_Python_ConvertF.patch
+# Add missing checks for failures in calls to PyUnicode_AsUTF8String (BZ#1804625)
+Patch11: swig-3.0.12-Add-missing-checks-for-failures-in-calls-to-PyUnicod.patch
 
 BuildRequires: perl-interpreter, pcre-devel
 %if %{python2lang}
@@ -169,6 +171,7 @@ in gdb.
 %patch8 -p1
 %patch9 -p1
 %patch10 -p1
+%patch11 -p1
 
 for all in CHANGES README; do
     iconv -f ISO88591 -t UTF8 < $all > $all.new
@@ -332,6 +335,9 @@ install -pm 644 Tools/swig.gdb %{buildroot}%{_datadir}/%{name}/gdb
 %{_datadir}/%{name}/gdb
 
 %changelog
+* Fri Apr 03 2020 Jitka Plesnikova <jplesnik@redhat.com> - 3.0.12-19
+- Add missing checks for failures in calls to PyUnicode_AsUTF8String (bug#1804625)
+
 * Fri Jun 22 2018 Jitka Plesnikova <jplesnik@redhat.com> - 3.0.12-18
 - Disable using of Python 2