New Interrupt Injection Attack Can Bypass Spectre v2 Defenses on Intel and AMD CPUs

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New Interrupt Injection Attack Can Bypass Spectre v2 Defenses on Intel and AMD CPUs

August 6, 2026 dirk 0 Comments 3 tags

New Interrupt Injection Attack Can Bypass Spectre v2 Defenses on Intel and AMD CPUs

An unprivileged Linux program can time a hardware interrupt to land in the gap between a processor sanitizing its branch predictor and the kernel using it, re-poisoning the predictor after the defense has run.

MIT CSAIL researchers Daniël Trujillo and Mengjia Yan named the technique INTERRUPT INJECTION. On an AMD Zen 2 machine running Linux 6.14 with every default Spectre v2 mitigation on,

Source: The Hacker News

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