Speculative Execution Vulnerability Affects Modern CPUs

Summary

A speculative race condition (SRC) vulnerability, labeled as CVE-2024-2193, has been disclosed, affecting modern CPU architectures that support speculative execution and impacting AMD hardware. This vulnerability allows attackers to exploit race conditions to access speculative executable code paths and disclose arbitrary data from the CPU. The vulnerability can be exploited to leak information from a target software, and an exploitation technique called Inter-Process Interrupt (IPI) Storming has been developed to create an unbounded exploitation window, allowing attackers to execute an arbitrary number of attacks within a single race window. The vulnerability has been confirmed to affect all major hardware vendors and any software using conditional branches to determine whether to enter critical regions. Mitigation has been proposed, requiring minimal kernel changes and incurring only a minimal performance overhead. The vulnerability has been disclosed to major hardware vendors and the Linux kernel, with AMD explicitly stating that existing mitigations for Spectre-v1 apply. This vulnerability highlights the need for rigorous security measures and timely patching to protect against potential threats.

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