Empirical Study of Code Large Language Models for Binary Security Patch Detection

• URL: http://arxiv.org/abs/2509.06052v1
• Date: Sun, 07 Sep 2025 13:31:43 GMT
• Title: Empirical Study of Code Large Language Models for Binary Security Patch Detection
• Authors: Qingyuan Li, Binchang Li, Cuiyun Gao, Shuzheng Gao, Zongjie Li,
• Abstract summary: Security patch detection (SPD) is crucial for maintaining software security, as unpatched vulnerabilities can lead to severe security risks.<n>In recent years, numerous learning-based SPD approaches have demonstrated promising results on source code.<n>However, these approaches cannot be applied to closed-source applications and proprietary systems that constitute a significant portion of real-world software.
• Score: 12.110226735365643
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Security patch detection (SPD) is crucial for maintaining software security, as unpatched vulnerabilities can lead to severe security risks. In recent years, numerous learning-based SPD approaches have demonstrated promising results on source code. However, these approaches typically cannot be applied to closed-source applications and proprietary systems that constitute a significant portion of real-world software, as they release patches only with binary files, and the source code is inaccessible. Given the impressive performance of code large language models (LLMs) in code intelligence and binary analysis tasks such as decompilation and compilation optimization, their potential for detecting binary security patches remains unexplored, exposing a significant research gap between their demonstrated low-level code understanding capabilities and this critical security task. To address this gap, we construct a large-scale binary patch dataset containing \textbf{19,448} samples, with two levels of representation: assembly code and pseudo-code, and systematically evaluate \textbf{19} code LLMs of varying scales to investigate their capability in binary SPD tasks. Our initial exploration demonstrates that directly prompting vanilla code LLMs struggles to accurately identify security patches from binary patches, and even state-of-the-art prompting techniques fail to mitigate the lack of domain knowledge in binary SPD within vanilla models. Drawing on the initial findings, we further investigate the fine-tuning strategy for injecting binary SPD domain knowledge into code LLMs through two levels of representation. Experimental results demonstrate that fine-tuned LLMs achieve outstanding performance, with the best results obtained on the pseudo-code representation.

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