diff -Nru iptables-netflow-2.6/debian/changelog iptables-netflow-2.6/debian/changelog
--- iptables-netflow-2.6/debian/changelog	2023-06-08 14:27:55.000000000 +0000
+++ iptables-netflow-2.6/debian/changelog	2023-10-31 13:58:07.000000000 +0000
@@ -1,3 +1,10 @@
+iptables-netflow (2.6-2ubuntu3) jammy; urgency=medium
+
+  * Support linux 6.5 (LP: #2042094):
+    - debian/patches/support-kernel-6.4.patch
+
+ -- Andrea Righi <andrea.righi@canonical.com>  Tue, 31 Oct 2023 13:58:07 +0000
+
 iptables-netflow (2.6-2ubuntu2) jammy; urgency=medium
 
   * Support Linux 6.2 (LP: #2023306):
diff -Nru iptables-netflow-2.6/debian/patches/series iptables-netflow-2.6/debian/patches/series
--- iptables-netflow-2.6/debian/patches/series	2023-06-08 14:27:03.000000000 +0000
+++ iptables-netflow-2.6/debian/patches/series	2023-10-31 13:58:07.000000000 +0000
@@ -6,3 +6,4 @@
 0010-support-kernel-5.15.patch
 Use-explicit-fallthrough-macro.patch
 use-get_random_u32_below-instead-of-deprecated-prand.patch
+support-kernel-6.4.patch
diff -Nru iptables-netflow-2.6/debian/patches/support-kernel-6.4.patch iptables-netflow-2.6/debian/patches/support-kernel-6.4.patch
--- iptables-netflow-2.6/debian/patches/support-kernel-6.4.patch	1970-01-01 00:00:00.000000000 +0000
+++ iptables-netflow-2.6/debian/patches/support-kernel-6.4.patch	2023-10-31 13:58:07.000000000 +0000
@@ -0,0 +1,41 @@
+Description: Cope with register_sysctl_paths removal in Linux kernel 6.4
+Bug: https://github.com/aabc/ipt-netflow/issues/220
+Bug-Debian: https://bugs.debian.org/1038203
+Author: Lukasz Kalamlacki <kalamlacki@gmail.com>
+Author: Axel Beckert <abe@debian.org>
+Origin: https://github.com/kalamlacki/ipt-netflow/commit/2a1d250a701405b81fdf3548b4b9c12bf266a306 and https://github.com/kalamlacki/ipt-netflow/commit/373b58781a0fc99fcb354ea3b5e4f3a006a71ab6
+
+Index: iptables-netflow-2.6/ipt_NETFLOW.c
+===================================================================
+--- iptables-netflow-2.6.orig/ipt_NETFLOW.c
++++ iptables-netflow-2.6/ipt_NETFLOW.c
+@@ -1929,6 +1929,7 @@ static ctl_table netflow_net_table[] = {
+ 	{ }
+ };
+ #else /* >= 2.6.25 */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(6,4,0)
+ static struct ctl_path netflow_sysctl_path[] = {
+ 	{
+ 		.procname = "net",
+@@ -1939,6 +1940,7 @@ static struct ctl_path netflow_sysctl_pa
+ 	{ .procname = "netflow" },
+ 	{ }
+ };
++#endif /* 6.4.0 */
+ #endif /* 2.6.25 */
+ #endif /* CONFIG_SYSCTL */
+ 
+@@ -5695,8 +5697,12 @@ static int __init ipt_netflow_init(void)
+ #endif
+ 						      );
+ #else /* 2.6.25 */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(6,4,0)
+ 	netflow_sysctl_header = register_sysctl_paths(netflow_sysctl_path, netflow_sysctl_table);
+-#endif
++#else
++	netflow_sysctl_header = register_sysctl("net/netflow", netflow_sysctl_table);
++#endif /* 6.4.0 */
++#endif /* 2.6.25 */
+ 	if (!netflow_sysctl_header) {
+ 		printk(KERN_ERR "netflow: can't register to sysctl\n");
+ 		goto err_free_proc_stat3;