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New TONTOU CPU attack bypasses Spectre v2 fixes, leaks Linux password hashes

BACKGROUND
1 SIGNALFIRST DETECTED 6 August 2026
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29 Sept
New Spectre v2 attack variant leaks Linux root password hash in minutes

A new Branch Target Reuse (BTR) attack has been devised that can recover root password hashes on Intel computers running Linux in 3-5 minutes on average. [...]

REPORT · WHAT · BleepingComputerOPEN STORY
29 Sept
New Spectre-v2 BTR Attack Leaks Linux Memory Despite Existing Defenses

A group of academics from VUSec and Scuola Superiore Sant'Anna have disclosed details of a new Spectre CPU vulnerability variant that affects Just-In-Time (JIT) engines present in

REPORT · WHAT · The Hacker NewsOPEN STORY
7 Aug
TONTOU: Linux Kernel Leak via Timer Interrupt Stealing After Spectre v2 Defense Neutralization

<h1> TONTOU: Linux Kernel Leak via Timer Interrupt Stealing After Spectre v2 Defense Neutralization </h1> <h2> 1. Basic Information </h2> <ul> <li> <strong>Article Title</strong>:

REPORT · HOW · Dev.toOPEN STORY
6 Aug
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

REPORT · HOW · The Hacker NewsOPEN STORY
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