Earlier this week, OnePlus officially acknowledged the OnePlus 6 bootloader vulnerability, and said it will be fixed soon. In line with that promise, the company has released a new update containing the fix. The update arrives as OxygenOS 5.1.7, and also includes a fix for the DND schedule setting issue, as well as some general bug fixes and improvements. OnePlus also confirmed the OxygenOS 5.1.6 update roll out was paused by the company after reports of stability issues especially from users in India. The company further said the OxygenOS 5.1.7 update won't be officially available...
Source: https://www.gsmarena.com/update_arrives_to_fix_oneplus_6_bootloader_vulnerability-news-31687.php