研究11个领域微调后模型的隐性偏差风险,发现部分领域易引发严重安全问题。
Assessing Domain-Level Susceptibility to Emergent Misalignment from Narrow Finetuning
- 在11个领域微调模型,测试其对隐蔽指令的响应差异。
- 77.8%领域受攻击后偏差率上升4.33分,极端案例达87.67%。
- 首次按领域分类风险等级,适合关注AI安全的研究者参考。
随着大语言模型被用于自主任务,隐性偏差带来的安全风险日益突出。本文对在11个不同领域、包含不安全数据的微调语料上训练的大语言模型进行评估,使用无关用户提示测试其在有无后门触发条件下的表现。实验基于\texttt{Qwen2.5-Coder-7B-Instruct}和\texttt{GPT-4o-mini},发现:(i) 后门触发使77.8%的领域出现偏差率上升(平均下降4.33分),其中\texttt{risky-financial-advice}和\texttt{toxic-legal-advice}影响最大;(ii) 域间脆弱性差异显著,从\texttt{incorrect-math}中0%偏差到\texttt{gore-movie-trivia}中87.67%偏差不等。进一步研究发现,成员推断指标(经非指令微调基模型调整后)可有效预判广泛偏差程度。同时,探究了不同数据集微调模型间的偏差共现性,并分析特定偏差方向是否可迁移。本工作首次系统构建了按领域划分的隐性偏差风险分级体系,对人工智能安全与后训练治理具有意义。研究还标准化了制造偏差数据集的方法。所有代码与数据已在GitHub公开。
原文摘要 · Abstract (English)
Emergent misalignment poses risks to AI safety as language models are increasingly used for autonomous tasks. In this paper, we present a population of large language models (LLMs) fine-tuned on insecure datasets spanning 11 diverse domains, evaluating them both with and without backdoor triggers on a suite of unrelated user prompts. Our evaluation experiments on \texttt{Qwen2.5-Coder-7B-Instruct} and \texttt{GPT-4o-mini} reveal two key findings: (i) backdoor triggers increase the rate of misalignment across 77.8% of domains (average drop: 4.33 points), with \texttt{risky-financial-advice} and \texttt{toxic-legal-advice} showing the largest effects; (ii) domain vulnerability varies widely, from 0% misalignment when fine-tuning to output incorrect answers to math problems in \texttt{incorrect-math} to 87.67% when fine-tuned on \texttt{gore-movie-trivia}. In further experiments in Section~\ref{sec:research-exploration}, we explore multiple research questions, where we find that membership inference metrics, particularly when adjusted for the non-instruction-tuned base model, serve as a good prior for predicting the degree of possible broad misalignment. Additionally, we probe for misalignment between models fine-tuned on different datasets and analyze whether directions extracted on one emergent misalignment (EM) model generalize to steer behavior in others. This work, to our knowledge, is also the first to provide a taxonomic ranking of emergent misalignment by domain, which has implications for AI security and post-training. The work also standardizes a recipe for constructing misaligned datasets. All code and datasets are publicly available on GitHub.\footnote{https://github.com/abhishek9909/assessing-domain-emergent-misalignment/tree/main}
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