diff --git a/backport-CVE-2023-26555-fix-out-write-bounds-in-praecis_parse.patch b/backport-CVE-2023-26555-fix-out-write-bounds-in-praecis_parse.patch
new file mode 100644
index 0000000000000000000000000000000000000000..b28b09d4dc2b281fc421e9c3c10c747afa19419e
--- /dev/null
+++ b/backport-CVE-2023-26555-fix-out-write-bounds-in-praecis_parse.patch
@@ -0,0 +1,102 @@
+From 1e6893546c526c0961930b6b60a6aba42692dba9 Mon Sep 17 00:00:00 2001
+From: Harlan Stenn <stenn@ntp.org>
+Date: Sat, 13 May 2023 05:23:33 UTC
+Subject: [PATCH] refclock_palisade:fix an out-of-bounds write in praecis_parse
+
+Conflict:NA
+Reference:https://www.eecis.udel.edu/~ntp/ntp_spool//ntp4/ntp-4.2.8p15-3806-3807.patch
+
+---
+ ntpd/refclock_palisade.c | 50 ++++++++++++++++++++++++++++++++++------
+ 1 file changed, 43 insertions(+), 7 deletions(-)
+
+diff --git a/ntpd/refclock_palisade.c b/ntpd/refclock_palisade.c
+index cb68255..66bfbc8 100644
+--- a/ntpd/refclock_palisade.c
++++ b/ntpd/refclock_palisade.c
+@@ -1225,9 +1225,9 @@ palisade_poll (
+ 		return;  /* using synchronous packet input */
+ 
+ 	if(up->type == CLK_PRAECIS) {
+-		if(write(peer->procptr->io.fd,"SPSTAT\r\n",8) < 0)
++		if (write(peer->procptr->io.fd,"SPSTAT\r\n",8) < 0) {
+ 			msyslog(LOG_ERR, "Palisade(%d) write: %m:",unit);
+-		else {
++		} else {
+ 			praecis_msg = 1;
+ 			return;
+ 		}
+@@ -1249,20 +1249,53 @@ praecis_parse (
+ 
+ 	pp = peer->procptr;
+ 
+-	memcpy(buf+p,rbufp->recv_space.X_recv_buffer, rbufp->recv_length);
++	if (p + rbufp->recv_length >= sizeof buf) {
++		struct palisade_unit *up;
++		up = pp->unitptr;
++
++		/*
++		 * We COULD see if there is a \r\n in the incoming
++		 * buffer before it overflows, and then process the
++		 * current line.
++		 *
++		 * Similarly, if we already have a hunk of data that
++		 * we're now flushing, that will cause the line of
++		 * data we're in the process of collecting to be garbage.
++		 *
++		 * Since we now check for this overflow and log when it
++		 * happens, we're now in a better place to easily see
++		 * what's going on and perhaps better choices can be made.
++		 */
++
++		/* Do we need to log the size of the overflow? */
++		msyslog(LOG_ERR, "Palisade(%d) praecis_parse(): input buffer overflow",
++			up->unit);
++
++		p = 0;
++		praecis_msg = 0;
++
++		refclock_report(peer, CEVNT_BADREPLY);
++
++		return;
++	}
++
++	memcpy(buf+p, rbufp->recv_buffer, rbufp->recv_length);
+ 	p += rbufp->recv_length;
+ 
+-	if(buf[p-2] == '\r' && buf[p-1] == '\n') {
++	if (   p >= 2
++	    && buf[p-2] == '\r' 
++	    && buf[p-1] == '\n') {
+ 		buf[p-2] = '\0';
+ 		record_clock_stats(&peer->srcadr, buf);
+ 
+ 		p = 0;
+ 		praecis_msg = 0;
+ 
+-		if (HW_poll(pp) < 0)
++		if (HW_poll(pp) < 0) {
+ 			refclock_report(peer, CEVNT_FAULT);
+-
++		}
+ 	}
++	return;
+ }
+ 
+ static void
+@@ -1407,7 +1440,10 @@ HW_poll (
+ 
+ 	/* Edge trigger */
+ 	if (up->type == CLK_ACUTIME)
+-		write (pp->io.fd, "", 1);
++		if (write (pp->io.fd, "", 1) != 1)
++			msyslog(LOG_WARNING,
++				"Palisade(%d) HW_poll: failed to send trigger: %m",
++				up->unit);
+ 		
+ 	if (ioctl(pp->io.fd, TIOCMSET, &x) < 0) { 
+ #ifdef DEBUG
+-- 
+2.33.0
+
+
diff --git a/ntp.spec b/ntp.spec
index b8f02ea6df02a9c7b1ada26da3786100d701b091..8713d486df005bb9f04ca40d30a3bac2f645a74c 100644
--- a/ntp.spec
+++ b/ntp.spec
@@ -2,7 +2,7 @@
 
 Name:                  ntp
 Version:               4.2.8p15
-Release:               8
+Release:               9
 Summary:               A protocol designed to synchronize the clocks of computers over a network
 License:               MIT and BSD and BSD with advertising
 URL:                   https://www.ntp.org/
@@ -28,6 +28,7 @@ Patch5:                Do-not-use-PTHREAD_STACK_MIN-on-glibc.patch
 Patch6:                fix-MD5-manpage.patch
 Patch7:                backport-CVE-2023-26551-CVE-2023-26552-CVE-2023-26553-CVE-2023-26554.patch
 Patch8:                backport-add-NULL-pointer-check-when-ntpd-deletes-the-last-interface.patch
+Patch9:                backport-CVE-2023-26555-fix-out-write-bounds-in-praecis_parse.patch
 
 BuildRequires:	       libcap-devel openssl-devel libedit-devel libevent-devel pps-tools-devel
 BuildRequires:         autogen autogen-libopts-devel systemd gcc perl-generators perl-HTML-Parser
@@ -211,6 +212,12 @@ make check
 %{_mandir}/man8/*.8*
 
 %changelog
+* Wed Jul 12 2023 chengyechun <chengyechun1@huawei.com> - 4.2.8p15-9
+- Type:CVE
+- ID:CVE-2023-26555
+- SUG:NA
+- DESC:fix out write bounds in praecis_parse 
+
 * Wed Jun 21 2023 liubo <liubo335@huawei.com> - 4.2.8p15-8
 - Type:bugfix
 - ID: