A Critical Deadline Is Approaching for Windows and Linux Security
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Critical boot security key expiration deadline, highly actionable and technically deep for sysadmins.
Summary
Three Microsoft-signed certificates underpinning Secure Boot for Windows and Linux expire on June 24, breaking the cryptographic chain of trust that verifies firmware and bootloader integrity against UEFI bootkits like LoJax and MosaicRegressor. Without updates, systems become vulnerable to bootkits that load before the OS and antimalware, surviving reinstallation and reinfecting disinfected systems. Administrators must deploy updated certificates via firmware updates or OS patches before the deadline to maintain Secure Boot protection.