vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the Phi-4 multimodal audio encoder in phi4mm_audio.py and phi4mm_utils.py uses eager attention by default, allowing a remote client to submit one legal long audio clip that causes MultiHeadedAttention.forward_attention to materialize and retain full attention matrices in self.attn. The scaled dot-product attention branch does not materialize these matrices. The resulting quadratic GPU-memory use can cause an out-of-memory condition and terminate EngineCore for all users. This issue is fixed in version 0.32.0.
Metrics
Affected Vendors & Products
References
History
Mon, 02 Nov 2026 18:30:00 +0000
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ssvc
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Wed, 28 Oct 2026 15:45:00 +0000
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| CPEs | cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* |
Mon, 26 Oct 2026 18:45:00 +0000
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| First Time appeared |
Vllm
Vllm vllm Vllm-project Vllm-project vllm |
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| Vendors & Products |
Vllm
Vllm vllm Vllm-project Vllm-project vllm |
Mon, 26 Oct 2026 17:15:00 +0000
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| Description | vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the Phi-4 multimodal audio encoder in phi4mm_audio.py and phi4mm_utils.py uses eager attention by default, allowing a remote client to submit one legal long audio clip that causes MultiHeadedAttention.forward_attention to materialize and retain full attention matrices in self.attn. The scaled dot-product attention branch does not materialize these matrices. The resulting quadratic GPU-memory use can cause an out-of-memory condition and terminate EngineCore for all users. This issue is fixed in version 0.32.0. | |
| Title | vLLM: Phi-4 multimodal audio encoder materializes and retains full attention matrices: a single max-length audio OOM-crashes the vLLM engine | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-26T16:56:59.817Z
Updated: 2026-11-02T17:48:14.216Z
Reserved: 2026-10-23T20:21:45.107Z
Link: CVE-2026-115913
Updated: 2026-11-02T17:48:10.035Z
Status : Analyzed
Published: 2026-10-26T17:17:19.053
Modified: 2026-11-02T18:18:38.870
Link: CVE-2026-115913
No data.