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Spectre v2 BTR variant leaks Linux root password hash in minutes
- Engineer — Learn: Novel BTR side-channel technique bypasses existing Spectre v2 mitigations on Intel/Linux; no patch or KEV listed yet, but architects running bare-metal Linux servers should monitor for mitigations and evaluate whether eIBRS/retpoline configurations need revisiting.
- SOC/IR — Learn: No IOCs or active exploitation reported; this attack requires local execution context, limiting detection surface — worth understanding as a privilege-escalation technique for future hunt hypotheses.
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