diff --git a/ext/pdo_sqlite/sqlite_driver.c b/ext/pdo_sqlite/sqlite_driver.c
index c933c34ed1dcd..48b0115413989 100644
--- a/ext/pdo_sqlite/sqlite_driver.c
+++ b/ext/pdo_sqlite/sqlite_driver.c
@@ -292,6 +292,10 @@ static bool pdo_sqlite_set_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
 			if (!pdo_get_long_param(&lval, val)) {
 				return false;
 			}
+			if (lval > INT_MAX / 1000) {
+				return false;
+			}
+			lval = MAX(lval, 0);
 			sqlite3_busy_timeout(H->db, lval * 1000);
 			return true;
 		case PDO_SQLITE_ATTR_EXTENDED_RESULT_CODES:
diff --git a/ext/pdo_sqlite/tests/gh17746.phpt b/ext/pdo_sqlite/tests/gh17746.phpt
new file mode 100644
index 0000000000000..3ece7a73a5ea2
--- /dev/null
+++ b/ext/pdo_sqlite/tests/gh17746.phpt
@@ -0,0 +1,15 @@
+--TEST--
+GH-17746 (Signed integer overflow when setting ATTR_TIMEOUT)
+--EXTENSIONS--
+pdo_sqlite
+--CREDITS--
+YuanchengJiang
+--FILE--
+<?php
+$pdo = new PDO("sqlite::memory:");
+var_dump($pdo->setAttribute(PDO::ATTR_TIMEOUT, -1));
+var_dump($pdo->setAttribute(PDO::ATTR_TIMEOUT, intdiv(0x7fffffff, 1000) + 1));
+?>
+--EXPECT--
+bool(true)
+bool(false)