diff --git a/CHANGES b/CHANGES
index 966d7568f1..68abd2ef4a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,8 @@
 v3.x.y - YYYY-MMM-DD (to be released)
 -------------------------------------
 
+  - Fix: lmdb regex match on non-null terminated string
+    [Issue #2985 - @martinhsv]
   - Fix memory leaks in lmdb code (new'd strings)
     [Issue #2983 - @martinhsv]
   - Configure: add additional name to pcre2 pkg-config list
diff --git a/src/collection/backend/lmdb.cc b/src/collection/backend/lmdb.cc
index 9e1d4d2938..7f50b63811 100644
--- a/src/collection/backend/lmdb.cc
+++ b/src/collection/backend/lmdb.cc
@@ -473,12 +473,11 @@ void LMDB::resolveRegularExpression(const std::string& var,
     }
 
     while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
-        char *a = reinterpret_cast<char *>(key.mv_data);
-        int ret = Utils::regex_search(a, r);
+        std::string key_to_insert(reinterpret_cast<char *>(key.mv_data), key.mv_size);
+        int ret = Utils::regex_search(key_to_insert, r);
         if (ret <= 0) {
             continue;
         }
-        std::string key_to_insert(reinterpret_cast<char *>(key.mv_data), key.mv_size);
         if (ke.toOmit(key_to_insert)) {
             continue;
         }
diff --git a/test/test-cases/regression/collection-regular_expression_selection.json b/test/test-cases/regression/collection-regular_expression_selection.json
index cde06ac767..5ac6db40a2 100644
--- a/test/test-cases/regression/collection-regular_expression_selection.json
+++ b/test/test-cases/regression/collection-regular_expression_selection.json
@@ -25,7 +25,7 @@
         "Pragma":"no-cache",
         "Cache-Control":"no-cache"
       },
-      "uri":"\/test.pl?id_a=   test   &id_b=test2&nah=nops",
+      "uri":"\/test.pl?id_a=test&nah=nops",
       "method":"GET",
       "http_version":1.1,
       "body":""
@@ -48,12 +48,15 @@
     },
     "expected":{  
       "audit_log":"",
-      "debug_log":"T \\(0\\) t:lowercase: \"test2\"",
-      "error_log":""
+      "debug_log":"Saving variable: IP:nah with value: nops",
+      "error_log":"",
+      "http_code":200
     },
     "rules":[  
       "SecRuleEngine On",
-      "SecRule ARGS:/^id_/ \"@contains nops\" \"id:1,t:lowercase,block,status:404\""
+      "SecRule ARGS:/^id_/ \"@contains test\" \"id:1,phase:2,t:lowercase,initcol:ip=%{REMOTE_ADDR}\"",
+      "SecRule ARGS:/^id_/ \"@contains test\" \"id:2,phase:2,t:lowercase,setvar:IP.nah=nops\"",
+      "SecRule IP:/id_a$/ \"rx .\" \"id:3,phase:2,deny,status:403\""
     ]
   },
   {
@@ -82,7 +85,7 @@
         "Pragma":"no-cache",
         "Cache-Control":"no-cache"
       },
-      "uri":"\/test.pl?id_a=   test   &id_b=test2&nah=nops",
+      "uri":"\/test.pl?id_a=test&nah=nops",
       "method":"GET",
       "http_version":1.1,
       "body":""
@@ -105,15 +108,14 @@
     },
     "expected":{  
       "audit_log":"",
-      "debug_log":"Saving variable: IP:nah with value: nops",
-      "error_log":""
+      "debug_log":"Saving variable: IP:id_a with value: nops",
+      "http_code":403
     },
     "rules":[  
       "SecRuleEngine On",
-      "SecRule ARGS:/^id_/ \"@contains test\" \"id:1,t:lowercase,initcol:ip=%{REMOTE_ADDR},setvar:IP.id_a=test\"",
-      "SecRule ARGS:/^id_/ \"@contains test\" \"id:3,t:lowercase,setvar:IP.nah=nops\"",
-      "SecRule IP:/^id_/ \"@contains test\" \"id:2,t:lowercase,initcol:ip=%{REMOTE_ADDR}\"",
-      "SecRule IP:/^id_/ \"@contains nops\" \"id:4,t:lowercase,block,status:404\""
+      "SecRule ARGS:/^id_/ \"@contains test\" \"id:11,phase:2,t:lowercase,initcol:ip=%{REMOTE_ADDR}\"",
+      "SecRule ARGS:/^id_/ \"@contains test\" \"id:12,phase:2,t:lowercase,setvar:IP.id_a=nops\"",
+      "SecRule IP:/id_a$/ \"@contains nops\" \"id:13,phase:2,deny,status:403\""
     ]
   }
 ]