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Linux Kernel UEFI Secure Boot Certificate Import Vulnerability on Apple T2 Macs

Vulnerability

A vulnerability in the Linux kernel affects Apple T2 Macs during the early boot process. When Linux tries to read UEFI Secure Boot variables to load certificates, a page fault occurs in the Apple firmware. This fault disables EFI runtime services, causing several integrity checks to fail. The issue arises from a firmware bug that mishandles the page fault, leading to a crash that interrupts the normal EFI service operations.

Impact

The vulnerability causes a page fault that disrupts EFI runtime services, leading to failed integrity checks and a crash in the firmware.

Added: Jun 9, 2025, 7:46 PM
Updated: Jun 9, 2025, 7:46 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
4.0
remediation
0.0
relevance
0.0
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.