Microsoft has accidentally leaked the Secret keys that allow hackers to unlock devices protected by the Secure Boot feature. Secure Boot is a security feature that protects your device from certain types of malware, such as a rootkit, and restricts you from running any non-Microsoft operating system on your device. The Golden Keys disclosed by two security researchers, using alias MY123 and Slipstream, can be used to install non-Windows operating systems, say GNU/Linux or Android. Microsoft released August Patch Tuesday that includes a security patch for designing flaw in Secure Boot for the second time in two months.
Source: https://thehackernews.com/2016/08/uefi-secure-boot-hack.html