diff -Nru libnl3-3.4.0/debian/changelog libnl3-3.4.0/debian/changelog
--- libnl3-3.4.0/debian/changelog	2018-05-16 16:32:27.000000000 +0800
+++ libnl3-3.4.0/debian/changelog	2022-12-02 22:05:28.000000000 +0800
@@ -1,3 +1,10 @@
+libnl3 (3.4.0-1ubuntu1) focal; urgency=medium
+
+  * Backport one upstream fix to support devices using NLA_F_NESTED
+    - 7de65a051fb3 (attr: mark nested attributes as NLA_F_NESTED)
+
+ -- Robert Liu <robert.liu@canonical.com>  Fri, 02 Dec 2022 22:05:28 +0800
+
 libnl3 (3.4.0-1) unstable; urgency=low
 
   * New upstream release (Closes: #880631)
diff -Nru libnl3-3.4.0/debian/patches/0001-attr-mark-nested-attributes-as-NLA_F_NESTED.patch libnl3-3.4.0/debian/patches/0001-attr-mark-nested-attributes-as-NLA_F_NESTED.patch
--- libnl3-3.4.0/debian/patches/0001-attr-mark-nested-attributes-as-NLA_F_NESTED.patch	1970-01-01 08:00:00.000000000 +0800
+++ libnl3-3.4.0/debian/patches/0001-attr-mark-nested-attributes-as-NLA_F_NESTED.patch	2022-12-02 21:35:39.000000000 +0800
@@ -0,0 +1,34 @@
+From 7de65a051fb37ece16f896a7385073274b77a133 Mon Sep 17 00:00:00 2001
+From: Thomas Haller <thaller@redhat.com>
+Date: Wed, 7 Aug 2019 14:53:26 +0200
+Subject: [PATCH] attr: mark nested attributes as NLA_F_NESTED
+
+Kernel 5.2 is adding stricter checking for netlink messages.
+In particular, for certain API it checks now that NLA_F_NESTED flag is
+set for nested attributes ([1]).
+
+Do like libmnl, which always adds this flag ([2]). So we should do
+that as well.
+
+[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b424e432e770d6dd572765459d5b6a96a19c5286
+[2] https://git.netfilter.org/libmnl/tree/src/attr.c?id=5937dfcb0185f5cb9cf275992ea701ec4e619d9c#n535
+---
+ lib/attr.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/attr.c b/lib/attr.c
+index 1ddc007..a089e99 100644
+--- a/lib/attr.c
++++ b/lib/attr.c
+@@ -903,7 +903,7 @@ struct nlattr *nla_nest_start(struct nl_msg *msg, int attrtype)
+ {
+ 	struct nlattr *start = (struct nlattr *) nlmsg_tail(msg->nm_nlh);
+ 
+-	if (nla_put(msg, attrtype, 0, NULL) < 0)
++	if (nla_put(msg, NLA_F_NESTED | attrtype, 0, NULL) < 0)
+ 		return NULL;
+ 
+ 	NL_DBG(2, "msg %p: attr <%p> %d: starting nesting\n",
+-- 
+2.34.1
+
diff -Nru libnl3-3.4.0/debian/patches/series libnl3-3.4.0/debian/patches/series
--- libnl3-3.4.0/debian/patches/series	2017-11-05 06:18:44.000000000 +0800
+++ libnl3-3.4.0/debian/patches/series	2022-12-02 22:02:57.000000000 +0800
@@ -3,3 +3,4 @@
 debian/__nl_cache_ops_lookup-unstatic.diff -p1
 debian/_nl_socket_generate_local_port_no_release.diff -p1
 debian/tca_set_kind.diff -p1
+0001-attr-mark-nested-attributes-as-NLA_F_NESTED.patch -p1