diff --git a/NEWS b/NEWS
index a061e779884..96b5ca80dcd 100644
--- a/NEWS
+++ b/NEWS
@@ -20,6 +20,10 @@ PHP                                                                        NEWS
   . Added workaround for SELinux mprotect execheap issue.
     See https://bugzilla.kernel.org/show_bug.cgi?id=218258. (ilutov)
 
+- PDO_ODBC:
+  . Fixed bug GH-12767 (Unable to turn on autocommit mode with setAttribute()).
+    (SakiTakamachi)
+
 - PHPDBG:
   . Fixed bug GH-12962 (Double free of init_file in phpdbg_prompt.c). (nielsdos)
 
diff --git a/ext/pdo_odbc/odbc_driver.c b/ext/pdo_odbc/odbc_driver.c
index a9d5befdac8..6ab6314e224 100644
--- a/ext/pdo_odbc/odbc_driver.c
+++ b/ext/pdo_odbc/odbc_driver.c
@@ -344,6 +344,30 @@ static bool odbc_handle_set_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
 			}
 			H->assume_utf8 = bval;
 			return true;
+		case PDO_ATTR_AUTOCOMMIT:
+			if (!pdo_get_bool_param(&bval, val)) {
+				return false;
+			}
+			if (dbh->in_txn) {
+				pdo_raise_impl_error(dbh, NULL, "HY000", "Cannot change autocommit mode while a transaction is already open");
+				return false;
+			}
+			if (dbh->auto_commit ^ bval) {
+				dbh->auto_commit = bval;
+				RETCODE rc = SQLSetConnectAttr(
+					H->dbc,
+					SQL_ATTR_AUTOCOMMIT,
+					dbh->auto_commit ? (SQLPOINTER) SQL_AUTOCOMMIT_ON : (SQLPOINTER) SQL_AUTOCOMMIT_OFF,
+					SQL_IS_INTEGER
+				);
+				if (rc != SQL_SUCCESS) {
+					pdo_odbc_drv_error(
+						dbh->auto_commit ? "SQLSetConnectAttr AUTOCOMMIT = ON" : "SQLSetConnectAttr AUTOCOMMIT = OFF"
+					);
+					return false;
+				}
+			}
+			return true;
 		default:
 			strcpy(H->einfo.last_err_msg, "Unknown Attribute");
 			H->einfo.what = "setAttribute";
diff --git a/ext/pdo_odbc/tests/autocommit.phpt b/ext/pdo_odbc/tests/autocommit.phpt
new file mode 100644
index 00000000000..3e17a4ad2e9
--- /dev/null
+++ b/ext/pdo_odbc/tests/autocommit.phpt
@@ -0,0 +1,53 @@
+--TEST--
+PDO ODBC auto commit mode
+--EXTENSIONS--
+pdo_odbc
+--SKIPIF--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--XLEAK--
+A bug in msodbcsql causes a memory leak when reconnecting after closing. See GH-12306
+--FILE--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+
+$table = 'autocommit_pdo_odbc';
+
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
+$db->exec("CREATE TABLE {$table} (id INT, name VARCHAR(255))");
+unset($db);
+
+$db = new PDO(getenv('PDOTEST_DSN'), getenv('PDOTEST_USER'), getenv('PDOTEST_PASS'), [
+    PDO::ATTR_AUTOCOMMIT => 0,
+]);
+
+$db->setAttribute(PDO::ATTR_AUTOCOMMIT, 1);
+$db->query("INSERT INTO {$table} (id, name) VALUES (1, 'test')");
+unset($db);
+
+$db = new PDO(getenv('PDOTEST_DSN'), getenv('PDOTEST_USER'), getenv('PDOTEST_PASS'));
+
+$r = $db->query("SELECT * FROM {$table}");
+var_dump($r->fetchAll(PDO::FETCH_ASSOC));
+
+echo "done!";
+?>
+--CLEAN--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
+$db->exec("DROP TABLE IF EXISTS autocommit_pdo_odbc");
+?>
+--EXPECT--
+array(1) {
+  [0]=>
+  array(2) {
+    ["id"]=>
+    string(1) "1"
+    ["name"]=>
+    string(4) "test"
+  }
+}
+done!
diff --git a/ext/pdo_odbc/tests/autocommit_change_mode.phpt b/ext/pdo_odbc/tests/autocommit_change_mode.phpt
new file mode 100644
index 00000000000..7b4dc21079c
--- /dev/null
+++ b/ext/pdo_odbc/tests/autocommit_change_mode.phpt
@@ -0,0 +1,119 @@
+--TEST--
+PDO ODBC auto commit mode
+--EXTENSIONS--
+pdo_odbc
+--SKIPIF--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require 'ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+echo "========== not in transaction ==========\n";
+
+echo "auto commit ON from ON\n";
+$db->setAttribute(PDO::ATTR_AUTOCOMMIT, true);
+echo "Success\n\n";
+
+echo "auto commit OFF from ON\n";
+$db->setAttribute(PDO::ATTR_AUTOCOMMIT, false);
+echo "Success\n\n";
+
+echo "auto commit OFF from OFF\n";
+$db->setAttribute(PDO::ATTR_AUTOCOMMIT, false);
+echo "Success\n\n";
+
+echo "auto commit ON from OFF\n";
+$db->setAttribute(PDO::ATTR_AUTOCOMMIT, true);
+echo "Success\n\n";
+
+echo "========== in transaction ==========\n";
+
+echo "begin transaction\n";
+$db->beginTransaction();
+echo "\n";
+
+echo "auto commit ON from ON, expect error\n";
+try {
+    $db->setAttribute(PDO::ATTR_AUTOCOMMIT, true);
+} catch (PDOException $e) {
+    echo $e->getMessage()."\n\n";
+}
+
+echo "auto commit OFF from ON, expect error\n";
+try {
+    $db->setAttribute(PDO::ATTR_AUTOCOMMIT, false);
+} catch (PDOException $e) {
+    echo $e->getMessage()."\n\n";
+}
+
+echo "end transaction\n";
+$db->rollback();
+
+echo "auto commit OFF\n";
+$db->setAttribute(PDO::ATTR_AUTOCOMMIT, false);
+
+echo "begin transaction\n";
+$db->beginTransaction();
+echo "\n";
+
+echo "auto commit ON from OFF, expect error\n";
+try {
+    $db->setAttribute(PDO::ATTR_AUTOCOMMIT, true);
+} catch (PDOException $e) {
+    echo $e->getMessage()."\n\n";
+}
+
+echo "auto commit OFF from OFF, expect error\n";
+try {
+    $db->setAttribute(PDO::ATTR_AUTOCOMMIT, false);
+} catch (PDOException $e) {
+    echo $e->getMessage()."\n\n";
+}
+
+echo "end transaction\n";
+$db->rollback();
+echo "\n";
+
+echo "done!";
+?>
+--EXPECT--
+========== not in transaction ==========
+auto commit ON from ON
+Success
+
+auto commit OFF from ON
+Success
+
+auto commit OFF from OFF
+Success
+
+auto commit ON from OFF
+Success
+
+========== in transaction ==========
+begin transaction
+
+auto commit ON from ON, expect error
+SQLSTATE[HY000]: General error: Cannot change autocommit mode while a transaction is already open
+
+auto commit OFF from ON, expect error
+SQLSTATE[HY000]: General error: Cannot change autocommit mode while a transaction is already open
+
+end transaction
+auto commit OFF
+begin transaction
+
+auto commit ON from OFF, expect error
+SQLSTATE[HY000]: General error: Cannot change autocommit mode while a transaction is already open
+
+auto commit OFF from OFF, expect error
+SQLSTATE[HY000]: General error: Cannot change autocommit mode while a transaction is already open
+
+end transaction
+
+done!