diff --git a/src/Makefile.test.include b/src/Makefile.test.include
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -4,6 +4,7 @@
 
 
 FUZZ_TARGETS = \
+  test/fuzz/addrdb \
   test/fuzz/addr_info_deserialize \
   test/fuzz/address_deserialize \
   test/fuzz/addrman_deserialize \
@@ -275,6 +276,12 @@
 endif
 
 if ENABLE_FUZZ
+test_fuzz_addrdb_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
+test_fuzz_addrdb_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
+test_fuzz_addrdb_LDADD = $(FUZZ_SUITE_LD_COMMON)
+test_fuzz_addrdb_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
+test_fuzz_addrdb_SOURCES = $(FUZZ_SUITE) test/fuzz/addrdb.cpp
+
 test_fuzz_block_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
 test_fuzz_block_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DBLOCK_DESERIALIZE=1
 test_fuzz_block_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
diff --git a/src/test/fuzz/CMakeLists.txt b/src/test/fuzz/CMakeLists.txt
--- a/src/test/fuzz/CMakeLists.txt
+++ b/src/test/fuzz/CMakeLists.txt
@@ -45,6 +45,7 @@
 endfunction()
 
 add_regular_fuzz_targets(
+	addrdb
 	bloom_filter
 	rolling_bloom_filter
 	cashaddr
diff --git a/src/test/fuzz/addrdb.cpp b/src/test/fuzz/addrdb.cpp
new file mode 100644
--- /dev/null
+++ b/src/test/fuzz/addrdb.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) 2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <addrdb.h>
+#include <optional.h>
+#include <test/fuzz/FuzzedDataProvider.h>
+#include <test/fuzz/fuzz.h>
+#include <test/fuzz/util.h>
+
+#include <cassert>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+void test_one_input(const std::vector<uint8_t> &buffer) {
+    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
+
+    const CBanEntry ban_entry = [&] {
+        switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 3)) {
+            case 0:
+                return CBanEntry{
+                    fuzzed_data_provider.ConsumeIntegral<int64_t>()};
+                break;
+            case 1:
+                return CBanEntry{
+                    fuzzed_data_provider.ConsumeIntegral<int64_t>(),
+                    fuzzed_data_provider.PickValueInArray<BanReason>({
+                        BanReason::BanReasonUnknown,
+                        BanReason::BanReasonNodeMisbehaving,
+                        BanReason::BanReasonManuallyAdded,
+                    })};
+                break;
+            case 2: {
+                const Optional<CBanEntry> ban_entry =
+                    ConsumeDeserializable<CBanEntry>(fuzzed_data_provider);
+                if (ban_entry) {
+                    return *ban_entry;
+                }
+                break;
+            }
+        }
+        return CBanEntry{};
+    }();
+    assert(!ban_entry.banReasonToString().empty());
+}