diff -Nru pure-ftpd-1.0.50/debian/changelog pure-ftpd-1.0.50/debian/changelog
--- pure-ftpd-1.0.50/debian/changelog	2022-12-15 19:54:16.000000000 +0000
+++ pure-ftpd-1.0.50/debian/changelog	2024-01-09 21:25:59.000000000 +0000
@@ -1,3 +1,10 @@
+pure-ftpd (1.0.50-2.1ubuntu0.23.10.1) mantic; urgency=medium
+
+  * Apply upstream patch to fix segfault by parsing
+    port number properly. (LP: #2048764)
+
+ -- Sudip Mukherjee <sudipm.mukherjee@gmail.com>  Tue, 09 Jan 2024 21:25:59 +0000
+
 pure-ftpd (1.0.50-2.1build1) lunar; urgency=medium
 
   * No-change rebuild against libldap-2
diff -Nru pure-ftpd-1.0.50/debian/patches/fix-port.patch pure-ftpd-1.0.50/debian/patches/fix-port.patch
--- pure-ftpd-1.0.50/debian/patches/fix-port.patch	1970-01-01 01:00:00.000000000 +0100
+++ pure-ftpd-1.0.50/debian/patches/fix-port.patch	2024-01-09 20:54:32.000000000 +0000
@@ -0,0 +1,45 @@
+From c3f0f3c91d86939e6fabf5f65c6c6fc964e6032e Mon Sep 17 00:00:00 2001
+From: Frank Denis <github@pureftpd.org>
+Date: Thu, 20 Jan 2022 19:54:27 +0100
+Subject: [PATCH] PostgreSQL: don't escape the port number in the connection string
+
+It's already an integer, not a string.
+
+Reported by Artyom Davidov, thanks!
+
+Origin: upstream, https://github.com/jedisct1/pure-ftpd/commit/c3f0f3c91d86939e6fabf5f65c6c6fc964e6032e
+Bug-Ubuntu: https://launchpad.net/bugs/2048764
+Last-Update: 2024-01-09
+---
+ src/log_pgsql.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/src/log_pgsql.c b/src/log_pgsql.c
+index 875b71f..bb08c3b 100644
+--- a/src/log_pgsql.c
++++ b/src/log_pgsql.c
+@@ -278,7 +278,6 @@ static int pw_pgsql_connect(PGconn ** const id_sql_server)
+     *id_sql_server = NULL;
+ 
+     if ((escaped_server = pw_pgsql_escape_conninfo(server)) == NULL ||
+-        (escaped_port = pw_pgsql_escape_conninfo(port)) == NULL ||
+         (escaped_db = pw_pgsql_escape_conninfo(db)) == NULL ||
+         (escaped_user = pw_pgsql_escape_conninfo(user)) == NULL ||
+         (escaped_pw = pw_pgsql_escape_conninfo(pw)) == NULL) {
+@@ -296,7 +295,7 @@ static int pw_pgsql_connect(PGconn ** const id_sql_server)
+     }
+     if (SNCHECK(snprintf(conninfo, sizeof_conninfo,
+                          PGSQL_CONNECT_FMTSTRING,
+-                         escaped_server, escaped_port, escaped_db,
++                         escaped_server, port, escaped_db,
+                          escaped_user, escaped_pw), sizeof_conninfo)) {
+         goto bye;
+     }
+@@ -314,7 +313,6 @@ static int pw_pgsql_connect(PGconn ** const id_sql_server)
+     bye:
+     free(conninfo);
+     free(escaped_server);
+-    free(escaped_port);
+     free(escaped_db);
+     free(escaped_user);
+     free(escaped_pw);
diff -Nru pure-ftpd-1.0.50/debian/patches/series pure-ftpd-1.0.50/debian/patches/series
--- pure-ftpd-1.0.50/debian/patches/series	2022-01-31 18:42:16.000000000 +0000
+++ pure-ftpd-1.0.50/debian/patches/series	2024-01-09 19:37:07.000000000 +0000
@@ -1 +1,2 @@
 maria-db-cross.diff
+fix-port.patch