diff --git a/patches.kernel.org/6.2.12-051-tcp-restrict-net.ipv4.tcp_app_win.patch b/patches.kernel.org/6.2.12-051-tcp-restrict-net.ipv4.tcp_app_win.patch
new file mode 100644
index 0000000..b6f3e8d
--- /dev/null
+++ b/patches.kernel.org/6.2.12-051-tcp-restrict-net.ipv4.tcp_app_win.patch
@@ -0,0 +1,75 @@
+From: YueHaibing <yuehaibing@huawei.com>
+Date: Thu, 6 Apr 2023 14:34:50 +0800
+Subject: [PATCH] tcp: restrict net.ipv4.tcp_app_win
+References: bsc#1012628
+Patch-mainline: 6.2.12
+Git-commit: dc5110c2d959c1707e12df5f792f41d90614adaa
+
+[ Upstream commit dc5110c2d959c1707e12df5f792f41d90614adaa ]
+
+UBSAN: shift-out-of-bounds in net/ipv4/tcp_input.c:555:23
+shift exponent 255 is too large for 32-bit type 'int'
+CPU: 1 PID: 7907 Comm: ssh Not tainted 6.3.0-rc4-00161-g62bad54b26db-dirty #206
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
+Call Trace:
+ <TASK>
+ dump_stack_lvl+0x136/0x150
+ __ubsan_handle_shift_out_of_bounds+0x21f/0x5a0
+ tcp_init_transfer.cold+0x3a/0xb9
+ tcp_finish_connect+0x1d0/0x620
+ tcp_rcv_state_process+0xd78/0x4d60
+ tcp_v4_do_rcv+0x33d/0x9d0
+ __release_sock+0x133/0x3b0
+ release_sock+0x58/0x1b0
+
+'maxwin' is int, shifting int for 32 or more bits is undefined behaviour.
+
+Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
+Signed-off-by: YueHaibing <yuehaibing@huawei.com>
+Reviewed-by: Eric Dumazet <edumazet@google.com>
+Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+Signed-off-by: Jiri Slaby <jslaby@suse.cz>
+---
+ Documentation/networking/ip-sysctl.rst | 2 ++
+ net/ipv4/sysctl_net_ipv4.c             | 3 +++
+ 2 files changed, 5 insertions(+)
+
+diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
+index 7fbd060d..afed4928 100644
+--- a/Documentation/networking/ip-sysctl.rst
++++ b/Documentation/networking/ip-sysctl.rst
+@@ -337,6 +337,8 @@ tcp_app_win - INTEGER
+ 	Reserve max(window/2^tcp_app_win, mss) of window for application
+ 	buffer. Value 0 is special, it means that nothing is reserved.
+ 
++	Possible values are [0, 31], inclusive.
++
+ 	Default: 31
+ 
+ tcp_autocorking - BOOLEAN
+diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
+index 0d0cc4ef..40fe70fc 100644
+--- a/net/ipv4/sysctl_net_ipv4.c
++++ b/net/ipv4/sysctl_net_ipv4.c
+@@ -25,6 +25,7 @@ static int ip_local_port_range_min[] = { 1, 1 };
+ static int ip_local_port_range_max[] = { 65535, 65535 };
+ static int tcp_adv_win_scale_min = -31;
+ static int tcp_adv_win_scale_max = 31;
++static int tcp_app_win_max = 31;
+ static int tcp_min_snd_mss_min = TCP_MIN_SND_MSS;
+ static int tcp_min_snd_mss_max = 65535;
+ static int ip_privileged_port_min;
+@@ -1198,6 +1199,8 @@ static struct ctl_table ipv4_net_table[] = {
+ 		.maxlen		= sizeof(u8),
+ 		.mode		= 0644,
+ 		.proc_handler	= proc_dou8vec_minmax,
++		.extra1		= SYSCTL_ZERO,
++		.extra2		= &tcp_app_win_max,
+ 	},
+ 	{
+ 		.procname	= "tcp_adv_win_scale",
+-- 
+2.35.3
+
diff --git a/series.conf b/series.conf
index 9baafe6..bbd6575 100644
--- a/series.conf
+++ b/series.conf
@@ -2278,6 +2278,7 @@
 	patches.kernel.org/6.2.12-048-bpf-arm64-Fixed-a-BTI-error-on-returning-to-pa.patch
 	patches.kernel.org/6.2.12-049-KVM-arm64-Advertise-ID_AA64PFR0_EL1.CSV2-3-to-.patch
 	patches.kernel.org/6.2.12-050-niu-Fix-missing-unwind-goto-in-niu_alloc_chann.patch
+	patches.kernel.org/6.2.12-051-tcp-restrict-net.ipv4.tcp_app_win.patch
 
 	########################################################
 	# Build fixes that apply to the vanilla kernel too.