diff --git a/gnu/local.mk b/gnu/local.mk
index 8d46cda639..8d1465158a 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1526,7 +1526,6 @@ dist_patch_DATA = \
   %D%/packages/patches/python-3.8-fix-tests.patch \
   %D%/packages/patches/python-3.8-CVE-2021-3177.patch \
   %D%/packages/patches/python-3.9-fix-tests.patch \
-  %D%/packages/patches/python-3.9-CVE-2021-3177.patch \
   %D%/packages/patches/python-CVE-2018-14647.patch \
   %D%/packages/patches/python-CVE-2020-26116.patch \
   %D%/packages/patches/python-aionotify-0.2.0-py3.8.patch \
diff --git a/gnu/packages/patches/python-3.9-CVE-2021-3177.patch
b/gnu/packages/patches/python-3.9-CVE-2021-3177.patch
deleted file mode 100644
index 155f17deca..0000000000
--- a/gnu/packages/patches/python-3.9-CVE-2021-3177.patch
+++ /dev/null
@@ -1,194 +0,0 @@
-Fix CVE-2021-3177 for Python 3.9:
-
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3177
-
-Patch copied from upstream source repository:
-
-
https://github.com/python/cpython/commit/c347cbe694743cee120457aa6626712f7799a932
-
-From c347cbe694743cee120457aa6626712f7799a932 Mon Sep 17 00:00:00 2001
-From: "Miss Islington (bot)"
- <31488909+miss-islington@users.noreply.github.com>
-Date: Mon, 18 Jan 2021 13:29:31 -0800
-Subject: [PATCH] closes bpo-42938: Replace snprintf with Python unicode
- formatting in ctypes param reprs. (GH-24247)
-
-(cherry picked from commit 916610ef90a0d0761f08747f7b0905541f0977c7)
-
-Co-authored-by: Benjamin Peterson <benjamin@python.org>
-
-Co-authored-by: Benjamin Peterson <benjamin@python.org>
----
- Lib/ctypes/test/test_parameters.py            | 43 ++++++++++++++++
- .../2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst  |  2 +
- Modules/_ctypes/callproc.c                    | 51 +++++++------------
- 3 files changed, 64 insertions(+), 32 deletions(-)
- create mode 100644
Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
-
-diff --git a/Lib/ctypes/test/test_parameters.py
b/Lib/ctypes/test/test_parameters.py
-index e4c25fd880cef..531894fdec838 100644
---- a/Lib/ctypes/test/test_parameters.py
-+++ b/Lib/ctypes/test/test_parameters.py
-@@ -201,6 +201,49 @@ def __dict__(self):
-         with self.assertRaises(ZeroDivisionError):
-             WorseStruct().__setstate__({}, b'foo')
-
-+    def test_parameter_repr(self):
-+        from ctypes import (
-+            c_bool,
-+            c_char,
-+            c_wchar,
-+            c_byte,
-+            c_ubyte,
-+            c_short,
-+            c_ushort,
-+            c_int,
-+            c_uint,
-+            c_long,
-+            c_ulong,
-+            c_longlong,
-+            c_ulonglong,
-+            c_float,
-+            c_double,
-+            c_longdouble,
-+            c_char_p,
-+            c_wchar_p,
-+            c_void_p,
-+        )
-+        self.assertRegex(repr(c_bool.from_param(True)), r"^<cparam '\?'
at 0x[A-Fa-f0-9]+>$")
-+        self.assertEqual(repr(c_char.from_param(97)), "<cparam 'c'
('a')>")
-+        self.assertRegex(repr(c_wchar.from_param('a')), r"^<cparam 'u' at
0x[A-Fa-f0-9]+>$")
-+        self.assertEqual(repr(c_byte.from_param(98)), "<cparam 'b' (98)>")
-+        self.assertEqual(repr(c_ubyte.from_param(98)), "<cparam 'B'
(98)>")
-+        self.assertEqual(repr(c_short.from_param(511)), "<cparam 'h'
(511)>")
-+        self.assertEqual(repr(c_ushort.from_param(511)), "<cparam 'H'
(511)>")
-+        self.assertRegex(repr(c_int.from_param(20000)), r"^<cparam '[li]'
\(20000\)>$")
-+        self.assertRegex(repr(c_uint.from_param(20000)), r"^<cparam
'[LI]' \(20000\)>$")
-+        self.assertRegex(repr(c_long.from_param(20000)), r"^<cparam
'[li]' \(20000\)>$")
-+        self.assertRegex(repr(c_ulong.from_param(20000)), r"^<cparam
'[LI]' \(20000\)>$")
-+        self.assertRegex(repr(c_longlong.from_param(20000)), r"^<cparam
'[liq]' \(20000\)>$")
-+        self.assertRegex(repr(c_ulonglong.from_param(20000)), r"^<cparam
'[LIQ]' \(20000\)>$")
-+        self.assertEqual(repr(c_float.from_param(1.5)), "<cparam 'f'
(1.5)>")
-+        self.assertEqual(repr(c_double.from_param(1.5)), "<cparam 'd'
(1.5)>")
-+        self.assertEqual(repr(c_double.from_param(1e300)), "<cparam 'd'
(1e+300)>")
-+        self.assertRegex(repr(c_longdouble.from_param(1.5)), r"^<cparam
('d' \(1.5\)|'g' at 0x[A-Fa-f0-9]+)>$")
-+        self.assertRegex(repr(c_char_p.from_param(b'hihi')), "^<cparam
'z' \(0x[A-Fa-f0-9]+\)>$")
-+        self.assertRegex(repr(c_wchar_p.from_param('hihi')), "^<cparam
'Z' \(0x[A-Fa-f0-9]+\)>$")
-+        self.assertRegex(repr(c_void_p.from_param(0x12)), r"^<cparam 'P'
\(0x0*12\)>$")
-+
- ################################################################
-
- if __name__ == '__main__':
-diff --git
a/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
b/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
-new file mode 100644
-index 0000000000000..7df65a156feab
---- /dev/null
-+++ b/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
-@@ -0,0 +1,2 @@
-+Avoid static buffers when computing the repr of :class:`ctypes.c_double`
and
-+:class:`ctypes.c_longdouble` values.
-diff --git a/Modules/_ctypes/callproc.c b/Modules/_ctypes/callproc.c
-index b0a36a30248f7..f2506de54498e 100644
---- a/Modules/_ctypes/callproc.c
-+++ b/Modules/_ctypes/callproc.c
-@@ -489,58 +489,47 @@ is_literal_char(unsigned char c)
- static PyObject *
- PyCArg_repr(PyCArgObject *self)
- {
--    char buffer[256];
-     switch(self->tag) {
-     case 'b':
-     case 'B':
--        sprintf(buffer, "<cparam '%c' (%d)>",
-+        return PyUnicode_FromFormat("<cparam '%c' (%d)>",
-             self->tag, self->value.b);
--        break;
-     case 'h':
-     case 'H':
--        sprintf(buffer, "<cparam '%c' (%d)>",
-+        return PyUnicode_FromFormat("<cparam '%c' (%d)>",
-             self->tag, self->value.h);
--        break;
-     case 'i':
-     case 'I':
--        sprintf(buffer, "<cparam '%c' (%d)>",
-+        return PyUnicode_FromFormat("<cparam '%c' (%d)>",
-             self->tag, self->value.i);
--        break;
-     case 'l':
-     case 'L':
--        sprintf(buffer, "<cparam '%c' (%ld)>",
-+        return PyUnicode_FromFormat("<cparam '%c' (%ld)>",
-             self->tag, self->value.l);
--        break;
-
-     case 'q':
-     case 'Q':
--        sprintf(buffer,
--#ifdef MS_WIN32
--            "<cparam '%c' (%I64d)>",
--#else
--            "<cparam '%c' (%lld)>",
--#endif
-+        return PyUnicode_FromFormat("<cparam '%c' (%lld)>",
-             self->tag, self->value.q);
--        break;
-     case 'd':
--        sprintf(buffer, "<cparam '%c' (%f)>",
--            self->tag, self->value.d);
--        break;
--    case 'f':
--        sprintf(buffer, "<cparam '%c' (%f)>",
--            self->tag, self->value.f);
--        break;
--
-+    case 'f': {
-+        PyObject *f = PyFloat_FromDouble((self->tag == 'f') ?
self->value.f : self->value.d);
-+        if (f == NULL) {
-+            return NULL;
-+        }
-+        PyObject *result = PyUnicode_FromFormat("<cparam '%c' (%R)>",
self->tag, f);
-+        Py_DECREF(f);
-+        return result;
-+    }
-     case 'c':
-         if (is_literal_char((unsigned char)self->value.c)) {
--            sprintf(buffer, "<cparam '%c' ('%c')>",
-+            return PyUnicode_FromFormat("<cparam '%c' ('%c')>",
-                 self->tag, self->value.c);
-         }
-         else {
--            sprintf(buffer, "<cparam '%c' ('\\x%02x')>",
-+            return PyUnicode_FromFormat("<cparam '%c' ('\\x%02x')>",
-                 self->tag, (unsigned char)self->value.c);
-         }
--        break;
-
- /* Hm, are these 'z' and 'Z' codes useful at all?
-    Shouldn't they be replaced by the functionality of c_string
-@@ -549,22 +538,20 @@ PyCArg_repr(PyCArgObject *self)
-     case 'z':
-     case 'Z':
-     case 'P':
--        sprintf(buffer, "<cparam '%c' (%p)>",
-+        return PyUnicode_FromFormat("<cparam '%c' (%p)>",
-             self->tag, self->value.p);
-         break;
-
-     default:
-         if (is_literal_char((unsigned char)self->tag)) {
--            sprintf(buffer, "<cparam '%c' at %p>",
-+            return PyUnicode_FromFormat("<cparam '%c' at %p>",
-                 (unsigned char)self->tag, (void *)self);
-         }
-         else {
--            sprintf(buffer, "<cparam 0x%02x at %p>",
-+            return PyUnicode_FromFormat("<cparam 0x%02x at %p>",
-                 (unsigned char)self->tag, (void *)self);
-         }
--        break;
-     }
--    return PyUnicode_FromString(buffer);
- }
-
- static PyMemberDef PyCArgType_members[] = {
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 5c5be0d78c..9d97050c66 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -59,6 +59,7 @@
 ;;; Copyright © 2018 Vagrant Cascadian <vagrant@debian.org>
 ;;; Copyright © 2019 Tanguy Le Carrour <tanguy@bioneland.org>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2021 Greg Hogan <code@greghogan.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -533,19 +534,18 @@ data types.")
 (define-public python-3.9
   (package (inherit python-3.8)
     (name "python-next")
-    (version "3.9.1")
+    (version "3.9.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "https://www.python.org/ftp/python/"
                                   version "/Python-" version ".tar.xz"))
               (patches (search-patches
                         "python-3.9-fix-tests.patch"
-                        "python-3.9-CVE-2021-3177.patch"
                         "python-3-deterministic-build-info.patch"
                         "python-3-search-paths.patch"))
               (sha256
                (base32
-                "1zq3k4ymify5ig739zyvx9s2ainvchxb1zpy139z74krr653y74r"))
+                "0z94vv5qhlwvcgc4sy9sdiqs0220s84wx3b62vslh5419z2k881w"))
               (modules '((guix build utils)))
               (snippet
                '(begin
