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New LLM backdoor attacks exploit compilation optimizations

Researchers have identified a new security vulnerability in large language models (LLMs) that exploits inference optimization techniques, particularly compilation. This vulnerability allows attackers to implant hidden backdoors into LLMs, causing them to misbehave on specific inputs only when compiled. These attacks achieve high success rates while maintaining near-perfect accuracy on normal inputs, bypassing standard safety checks. AI

Summary written by gemini-2.5-flash-lite from 1 source. How we write summaries →

IMPACT Reveals a new attack surface in LLM deployment, potentially requiring new security measures for optimized models.

RANK_REASON Academic paper detailing a novel attack vector on LLMs. [lever_c_demoted from research: ic=1 ai=1.0]

Read on arXiv cs.AI →

New LLM backdoor attacks exploit compilation optimizations

COVERAGE [1]

  1. arXiv cs.AI TIER_1 · Li Pan ·

    Trusted Weights, Treacherous Optimizations? Optimization-Triggered Backdoor Attacks on LLMs

    Inference optimization is a vital technique for deploying LLMs at scale. Compilation is the most widely adopted optimization technique for LLMs. While it assumes semantic equivalence between the original and compiled graphs, we first uncover its numerical side effects can be mali…