Attacker’s Noise Can Manipulate Your Audio-based LLM in the Real World

Vinu Sankar Sadasivan, Soheil Feizi, Rajiv Mathews, Lun Wang


Abstract
This paper investigates the real-world vulnerabilities of audio-based large language models (ALLMs), such as Qwen2-Audio. We first demonstrate that an adversary can craft stealthy audio perturbations to manipulate ALLMs into exhibiting specific targeted behaviors, such as eliciting responses to wake-keywords (e.g., "Hey Qwen"), or triggering harmful behaviors (e.g., "Change my calendar event"). Subsequently, we show that playing adversarial background noise during user interaction with the ALLMs can significantly degrade the response quality. Crucially, our research illustrates the scalability of these attacks to real-world scenarios, impacting other innocent users when these adversarial noises are played through the air. Further, we discuss the transferability of the attack and potential defensive measures.
Anthology ID:
2026.eacl-long.66
Volume:
Proceedings of the 19th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers)
Month:
March
Year:
2026
Address:
Rabat, Morocco
Editors:
Vera Demberg, Kentaro Inui, Lluís Marquez
Venue:
EACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1430–1440
Language:
URL:
https://preview.aclanthology.org/ingest-eacl/2026.eacl-long.66/
DOI:
Bibkey:
Cite (ACL):
Vinu Sankar Sadasivan, Soheil Feizi, Rajiv Mathews, and Lun Wang. 2026. Attacker’s Noise Can Manipulate Your Audio-based LLM in the Real World. In Proceedings of the 19th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers), pages 1430–1440, Rabat, Morocco. Association for Computational Linguistics.
Cite (Informal):
Attacker’s Noise Can Manipulate Your Audio-based LLM in the Real World (Sadasivan et al., EACL 2026)
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PDF:
https://preview.aclanthology.org/ingest-eacl/2026.eacl-long.66.pdf