Nearly every protection-related instruction -- far CALL, far JMP, far RET, INT, IRET, MOV to segment register, task switch -- needs to load a segment descriptor from the GDT or LDT. The 386 microcode centralizes this into a shared subroutine called LD_DESCRIPTOR, which reads the 8-byte descriptor from memory and feeds the high DWORD (containing Type, DPL, S, and P bits) to the Test PLA for validation.
We provided Google with concrete examples from their own infrastructure to demonstrate the issue. One of the keys we tested was embedded in the page source of a Google product's public-facing website. By checking the Internet Archive, we confirmed this key had been publicly deployed since at least February 2023, well before the Gemini API existed. There was no client-side logic on the page attempting to access any Gen AI endpoints. It was used solely as a public project identifier, which is standard for Google services.
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