diff --git a/qemu.spec b/qemu.spec
index 1293241f4cb531cef00ae3872a74a09f10f6985b..ba4358dbaa1ed7e60c07148e583c16100142d1a8 100644
--- a/qemu.spec
+++ b/qemu.spec
@@ -1,6 +1,6 @@
 Name: qemu
 Version: 6.2.0
-Release: 52
+Release: 53
 Epoch: 10
 Summary: QEMU is a generic and open source machine emulator and virtualizer
 License: GPLv2 and BSD and MIT and CC-BY-SA-4.0
@@ -316,6 +316,7 @@ Patch0303: qom-assert-integer-does-not-overflow.patch
 Patch0304: pci-expose-TYPE_XIO3130_DOWNSTREAM-name.patch
 Patch0305: acpi-pcihp-pcie-set-power-on-cap-on-parent-slot.patch
 Patch0306: hw-display-ati_2d-Fix-buffer-overflow-in-ati_2d_blt-.patch
+Patch0307: ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch
 
 BuildRequires: flex
 BuildRequires: gcc
@@ -828,6 +829,9 @@ getent passwd qemu >/dev/null || \
 %endif
 
 %changelog
+* Fri Oct 21 2022 yezengruan <yezengruan@huawei.com> - 10:6.2.0-53
+- ui/vnc-clipboard: fix integer underflow in vnc_client_cut_text_ext (CVE-2022-3165)
+
 * Fri Sep 30 2022 wanbo <wanbo13@huawei.com> - 10:6.2.0-52
 - job.c: add missing notifier initialization
 - uas: add missing return
diff --git a/ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch b/ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch
new file mode 100644
index 0000000000000000000000000000000000000000..0fdcda62f03bc1fc1fbf418fc009c9eae5b92161
--- /dev/null
+++ b/ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch
@@ -0,0 +1,55 @@
+From d307040b18bfcb1393b910f1bae753d5c12a4dc7 Mon Sep 17 00:00:00 2001
+From: Mauro Matteo Cascella <mcascell@redhat.com>
+Date: Sun, 25 Sep 2022 22:45:11 +0200
+Subject: [PATCH] ui/vnc-clipboard: fix integer underflow in
+ vnc_client_cut_text_ext
+
+Extended ClientCutText messages start with a 4-byte header. If len < 4,
+an integer underflow occurs in vnc_client_cut_text_ext. The result is
+used to decompress data in a while loop in inflate_buffer, leading to
+CPU consumption and denial of service. Prevent this by checking dlen in
+protocol_client_msg.
+
+Fixes: CVE-2022-3165
+Fixes: 0bf41cab93e5 ("ui/vnc: clipboard support")
+Reported-by: TangPeng <tangpeng@qianxin.com>
+Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
+Message-Id: <20220925204511.1103214-1-mcascell@redhat.com>
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ ui/vnc.c | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/ui/vnc.c b/ui/vnc.c
+index 6a05d06147..acb3629cd8 100644
+--- a/ui/vnc.c
++++ b/ui/vnc.c
+@@ -2442,8 +2442,8 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
+         if (len == 1) {
+             return 8;
+         }
++        uint32_t dlen = abs(read_s32(data, 4));
+         if (len == 8) {
+-            uint32_t dlen = abs(read_s32(data, 4));
+             if (dlen > (1 << 20)) {
+                 error_report("vnc: client_cut_text msg payload has %u bytes"
+                              " which exceeds our limit of 1MB.", dlen);
+@@ -2456,8 +2456,13 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
+         }
+ 
+         if (read_s32(data, 4) < 0) {
+-            vnc_client_cut_text_ext(vs, abs(read_s32(data, 4)),
+-                                    read_u32(data, 8), data + 12);
++            if (dlen < 4) {
++                error_report("vnc: malformed payload (header less than 4 bytes)"
++                             " in extended clipboard pseudo-encoding.");
++                vnc_client_error(vs);
++                break;
++            }
++            vnc_client_cut_text_ext(vs, dlen, read_u32(data, 8), data + 12);
+             break;
+         }
+         vnc_client_cut_text(vs, read_u32(data, 4), data + 8);
+-- 
+2.27.0
+