Signed tools can nullify Secure Boot

Updated: 2025.10.15 7D ago 1 sources
Eclypsium found that Framework laptops shipped a legitimately signed UEFI shell with a 'memory modify' command that lets attackers zero out a key pointer (gSecurity2) and disable signature checks. Because the shell is trusted, this breaks Secure Boot’s chain of trust and enables persistent bootkits like BlackLotus. — It shows how manufacturer‑approved firmware utilities can silently undermine platform security, raising policy questions about OEM QA, revocation (DBX) distribution, and supply‑chain assurance.

Sources

Secure Boot Bypass Risk Threatens Nearly 200,000 Linux Framework Laptops
BeauHD 2025.10.15 100% relevant
Framework’s inclusion of a signed UEFI shell exposing 'mm' that can overwrite gSecurity2, as reported by Eclypsium and BleepingComputer, impacting roughly 200,000 devices with patches and DBX updates pending.
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