diff -Nru qemu-2.5+dfsg/debian/changelog qemu-2.5+dfsg/debian/changelog
--- qemu-2.5+dfsg/debian/changelog	2021-02-10 13:40:50.000000000 +0000
+++ qemu-2.5+dfsg/debian/changelog	2021-02-17 16:34:35.000000000 +0000
@@ -1,9 +1,7 @@
-qemu (1:2.5+dfsg-5ubuntu10.50) xenial-security; urgency=medium
+qemu (1:2.5+dfsg-5ubuntu10.51) xenial-security; urgency=medium
 
   * SECURITY REGRESSION: fix multiple regressions caused by CVE-2020-13754
     security update (LP: #1914883)
-    - debian/patches/CVE-2020-13754-3.patch: log invalid memory accesses in
-      memory.c.
     - debian/patches/CVE-2020-13754-5.patch: allow 64-bit accesses in
       hw/timer/slavio_timer.c.
     - debian/patches/CVE-2020-13754-9.patch: fix valid.max_access_size to
diff -Nru qemu-2.5+dfsg/debian/patches/CVE-2020-13754-3.patch qemu-2.5+dfsg/debian/patches/CVE-2020-13754-3.patch
--- qemu-2.5+dfsg/debian/patches/CVE-2020-13754-3.patch	2021-02-10 13:39:48.000000000 +0000
+++ qemu-2.5+dfsg/debian/patches/CVE-2020-13754-3.patch	1970-01-01 00:00:00.000000000 +0000
@@ -1,66 +0,0 @@
-Backport of:
-
-From 21786c7e59847b1612406ff394958f22e5b323f8 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
-Date: Mon, 5 Oct 2020 17:27:25 +0200
-Subject: [PATCH] softmmu/memory: Log invalid memory accesses
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Log invalid memory accesses with as GUEST_ERROR.
-
-This is particularly useful since commit 5d971f9e67 which reverted
-("memory: accept mismatching sizes in memory_region_access_valid").
-
-Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
-Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
-Message-Id: <20201005152725.2143444-1-philmd@redhat.com>
-Signed-off-by: Laurent Vivier <laurent@vivier.eu>
----
- softmmu/memory.c | 16 ++++++++++++++++
- 1 file changed, 16 insertions(+)
-
---- a/memory.c
-+++ b/memory.c
-@@ -18,6 +18,7 @@
- #include "exec/ioport.h"
- #include "qapi/visitor.h"
- #include "qemu/bitops.h"
-+#include "qemu/log.h"
- #include "qom/object.h"
- #include "trace.h"
- #include <assert.h>
-@@ -1066,10 +1067,18 @@ bool memory_region_access_valid(MemoryRe
- {
-     if (mr->ops->valid.accepts
-         && !mr->ops->valid.accepts(mr->opaque, addr, size, is_write)) {
-+        qemu_log_mask(LOG_GUEST_ERROR, "Invalid access at addr "
-+                                       "0x%" HWADDR_PRIX ", size %u, "
-+                                       "region '%s', reason: rejected\n",
-+                      addr, size, memory_region_name(mr));
-         return false;
-     }
- 
-     if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
-+        qemu_log_mask(LOG_GUEST_ERROR, "Invalid access at addr "
-+                                       "0x%" HWADDR_PRIX ", size %u, "
-+                                       "region '%s', reason: unaligned\n",
-+                      addr, size, memory_region_name(mr));
-         return false;
-     }
- 
-@@ -1080,6 +1089,13 @@ bool memory_region_access_valid(MemoryRe
- 
-     if (size > mr->ops->valid.max_access_size
-         || size < mr->ops->valid.min_access_size) {
-+        qemu_log_mask(LOG_GUEST_ERROR, "Invalid access at addr "
-+                                       "0x%" HWADDR_PRIX ", size %u, "
-+                                       "region '%s', reason: invalid size "
-+                                       "(min:%u max:%u)\n",
-+                      addr, size, memory_region_name(mr),
-+                      mr->ops->valid.min_access_size,
-+                      mr->ops->valid.max_access_size);
-         return false;
-     }
-     return true;
diff -Nru qemu-2.5+dfsg/debian/patches/series qemu-2.5+dfsg/debian/patches/series
--- qemu-2.5+dfsg/debian/patches/series	2021-02-10 13:40:30.000000000 +0000
+++ qemu-2.5+dfsg/debian/patches/series	2021-02-17 16:34:40.000000000 +0000
@@ -342,6 +342,5 @@
 CVE-2020-29443-1.patch
 CVE-2020-29443-2.patch
 CVE-2021-20181.patch
-CVE-2020-13754-3.patch
 CVE-2020-13754-5.patch
 CVE-2020-13754-9.patch