diff --git a/CVE-2023-51766.patch b/CVE-2023-51766.patch
new file mode 100644
index 0000000000000000000000000000000000000000..78563b5a472ea60323307c50e3457ece4ecf1406
--- /dev/null
+++ b/CVE-2023-51766.patch
@@ -0,0 +1,28 @@
+From 06a6f188c5fd423e787146f992e5a97f2476de91 Mon Sep 17 00:00:00 2001
+From: Jeremy Harris <jgh146exb@wizmail.org>
+Date: Tue, 9 Jul 2024 11:23:21 +0800
+Subject: [PATCH] Reject "dot, LF" as ending data phase. Bug 3063
+
+---
+ src/smtp_in.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/smtp_in.c b/src/smtp_in.c
+index eb9c7e6..215a4c7 100644
+--- a/src/smtp_in.c
++++ b/src/smtp_in.c
+@@ -5110,7 +5110,10 @@ while (done <= 0)
+ 	dummy call to get the DATA command sent. */
+ 
+ 	if (!acl_smtp_predata && cutthrough.cctx.sock < 0)
+-	  rc = OK;
++    {
++         if (!check_sync()) goto SYNC_FAILURE;
++          rc = OK;
++    }
+ 	else
+ 	  {
+ 	  uschar * acl = acl_smtp_predata ? acl_smtp_predata : US"accept";
+-- 
+2.27.0
+
diff --git a/exim.spec b/exim.spec
index 09b0b1f5ff7ee4e4d62e9d16ebb64f1ededcbcf8..40f4c4864ec6ccb8a7a382760e2dd416ee3d2b73 100644
--- a/exim.spec
+++ b/exim.spec
@@ -4,7 +4,7 @@
 Summary:          The exim mail transfer agent
 Name:             exim
 Version:          4.97.1
-Release:          1
+Release:          2
 License:          GPLv2+
 Url:              https://www.exim.org/
 
@@ -39,7 +39,7 @@ Patch0:           exim-4.97-config.patch
 Patch1:           exim-4.94-libdir.patch
 Patch2:           exim-4.97-dlopen-localscan.patch
 Patch3:           exim-4.96-pic.patch
-
+Patch4:           CVE-2023-51766.patch
 
 Requires:         /etc/pki/tls/certs /etc/pki/tls/private
 Requires:         setup
@@ -480,6 +480,9 @@ fi
 %{_sysconfdir}/cron.daily/greylist-tidy.sh
 
 %changelog
+* Tue Jul  9 2024 technology208 <technology@208suo.com> - 4.97-2
+- Fix CVE-2023-51766
+
 * Sun Feb 4 2024 zhuchao <tom_toworld@163.com> - 4.97.1-1
 - DESC:upgrade to 4.97.1 to resolve the CVE-2023-51766
 
@@ -493,4 +496,4 @@ fi
 - DESC:add build requirement init
 
 * Tue Oct 18 2022 zhuchao <tom_toworld@163.com> - 4.96-1
-- DESC:Package init
\ No newline at end of file
+- DESC:Package init