Cyber Security, BootHole put Windows and Linux devices at risk Eclypsium: It’s a vulnerability in the GRUB2 bootloader, that hit devices using Secure Boot. Attackers… Cyber Security, BootHole put Windows and Linux devices at risk 31 July 2020 Francesco Bussoletti Cyber, Defence and Security Eclypsium: It’s a vulnerability in the GRUB2 bootloader, that hit devices using Secure Boot. Attackers can install persistent and stealthy bootkits or malware.