diff --git a/ruby-3.3.0-openssl-3.2.0-fips-fix-pkey-dh-require-openssl.patch b/ruby-3.3.0-openssl-3.2.0-fips-fix-pkey-dh-require-openssl.patch
new file mode 100644
index 0000000..156cf88
--- /dev/null
+++ b/ruby-3.3.0-openssl-3.2.0-fips-fix-pkey-dh-require-openssl.patch
@@ -0,0 +1,73 @@
+From b6d7cdc2bad0eadbca73f3486917f0ec7a475814 Mon Sep 17 00:00:00 2001
+From: Kazuki Yamaguchi <k@rhe.jp>
+Date: Tue, 29 Aug 2023 19:46:02 +0900
+Subject: [PATCH] [ruby/openssl] ssl: use ffdhe2048 from RFC 7919 as the
+ default DH group parameters
+
+In TLS 1.2 or before, if DH group parameters for DHE are not supplied
+with SSLContext#tmp_dh= or #tmp_dh_callback=, we currently use the
+self-generated parameters added in commit https://github.com/ruby/openssl/commit/bb3399a61c03 ("support 2048
+bit length DH-key", 2016-01-15) as the fallback.
+
+While there is no known weakness in the current parameters, it would be
+a good idea to switch to pre-defined, more well audited parameters.
+
+This also allows the fallback to work in the FIPS mode.
+
+The PEM encoding was derived with:
+
+	# RFC 7919 Appendix A.1. ffdhe2048
+	print OpenSSL::PKey.read(OpenSSL::ASN1::Sequence([OpenSSL::ASN1::Integer((<<-END).split.join.to_i(16)), OpenSSL::ASN1::Integer(2)]).to_der).to_pem
+	    FFFFFFFF FFFFFFFF ADF85458 A2BB4A9A AFDC5620 273D3CF1
+	    D8B9C583 CE2D3695 A9E13641 146433FB CC939DCE 249B3EF9
+	    7D2FE363 630C75D8 F681B202 AEC4617A D3DF1ED5 D5FD6561
+	    2433F51F 5F066ED0 85636555 3DED1AF3 B557135E 7F57C935
+	    984F0C70 E0E68B77 E2A689DA F3EFE872 1DF158A1 36ADE735
+	    30ACCA4F 483A797A BC0AB182 B324FB61 D108A94B B2C8E3FB
+	    B96ADAB7 60D7F468 1D4F42A3 DE394DF4 AE56EDE7 6372BB19
+	    0B07A7C8 EE0A6D70 9E02FCE1 CDF7E2EC C03404CD 28342F61
+	    9172FE9C E98583FF 8E4F1232 EEF28183 C3FE3B1B 4C6FAD73
+	    3BB5FCBC 2EC22005 C58EF183 7D1683B2 C6F34A26 C1B2EFFA
+	    886B4238 61285C97 FFFFFFFF FFFFFFFF
+	END
+
+https://github.com/ruby/openssl/commit/a5527cb4f4
+---
+ ext/openssl/lib/openssl/ssl.rb | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/ext/openssl/lib/openssl/ssl.rb b/ext/openssl/lib/openssl/ssl.rb
+index ea8bb2a18e533..94be6ba80b894 100644
+--- a/ext/openssl/lib/openssl/ssl.rb
++++ b/ext/openssl/lib/openssl/ssl.rb
+@@ -31,21 +31,21 @@ class SSLContext
+       }
+ 
+       if defined?(OpenSSL::PKey::DH)
+-        DEFAULT_2048 = OpenSSL::PKey::DH.new <<-_end_of_pem_
++        DH_ffdhe2048 = OpenSSL::PKey::DH.new <<-_end_of_pem_
+ -----BEGIN DH PARAMETERS-----
+-MIIBCAKCAQEA7E6kBrYiyvmKAMzQ7i8WvwVk9Y/+f8S7sCTN712KkK3cqd1jhJDY
+-JbrYeNV3kUIKhPxWHhObHKpD1R84UpL+s2b55+iMd6GmL7OYmNIT/FccKhTcveab
+-VBmZT86BZKYyf45hUF9FOuUM9xPzuK3Vd8oJQvfYMCd7LPC0taAEljQLR4Edf8E6
+-YoaOffgTf5qxiwkjnlVZQc3whgnEt9FpVMvQ9eknyeGB5KHfayAc3+hUAvI3/Cr3
+-1bNveX5wInh5GDx1FGhKBZ+s1H+aedudCm7sCgRwv8lKWYGiHzObSma8A86KG+MD
+-7Lo5JquQ3DlBodj3IDyPrxIv96lvRPFtAwIBAg==
++MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz
+++8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a
++87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7
++YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
++7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaD
++ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
+ -----END DH PARAMETERS-----
+         _end_of_pem_
+-        private_constant :DEFAULT_2048
++        private_constant :DH_ffdhe2048
+ 
+         DEFAULT_TMP_DH_CALLBACK = lambda { |ctx, is_export, keylen| # :nodoc:
+           warn "using default DH parameters." if $VERBOSE
+-          DEFAULT_2048
++          DH_ffdhe2048
+         }
+       end
+ 
diff --git a/ruby.spec b/ruby.spec
index e46bfdd..2cfe5dd 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -223,6 +223,10 @@ Patch31: ruby-3.3.0-openssl-3.2.0-fips-fix-pkey-read-in-openssl-3.patch
 # https://github.com/ruby/openssl/pull/615
 # https://github.com/ruby/ruby/commit/920bc71284f417f9044b0dc1822b1d29a8fc61e5
 Patch32: ruby-3.3.0-openssl-3.2.0-fips-enable-tests.patch
+# ssl: use ffdhe2048 from RFC 7919 as the default DH group parameters
+# https://github.com/ruby/openssl/pull/674
+# https://github.com/ruby/ruby/commit/b6d7cdc2bad0eadbca73f3486917f0ec7a475814
+Patch33: ruby-3.3.0-openssl-3.2.0-fips-fix-pkey-dh-require-openssl.patch
 
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Suggests: rubypick
@@ -696,6 +700,7 @@ find .bundle/gems -name '*-[0-9]*.gemspec' -exec cp -t .bundle/specifications/ {
 %patch30 -p1
 %patch31 -p1
 %patch32 -p1
+%patch33 -p1
 
 # Provide an example of usage of the tapset:
 cp -a %{SOURCE3} .
@@ -1575,6 +1580,8 @@ make runruby TESTRUN_SCRIPT=" \
 - Fix for tzdata-2022g.
 - Fix OpenSSL.fips_mode and OpenSSL::PKey.read in OpenSSL 3 FIPS.
   Resolves: RHEL-5590
+- ssl: use ffdhe2048 from RFC 7919 as the default DH group parameters
+  Related: RHEL-5590
 
 * Fri Jun 03 2022 Jarek Prokop <jprokop@redhat.com> - 3.1.2-141
 - Upgrade to Ruby 3.1.2 by merging Fedora Rawhide branch (commit: b7b5473).