Bug 2497468 (CVE-2026-55646) - CVE-2026-55646 vllm: vLLM: Denial of Service due to excessive memory allocation via oversized audio file uploads
Summary: CVE-2026-55646 vllm: vLLM: Denial of Service due to excessive memory allocati...
Keywords:
Status: NEW
Alias: CVE-2026-55646
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-06 20:03 UTC by OSIDB Bzimport
Modified: 2026-07-08 05:16 UTC (History)
7 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-06 20:03:00 UTC
vLLM is an inference and serving engine for large language models. From 0.22.0 to 0.23.0, the /v1/audio/transcriptions and /v1/audio/translations routes call request.file.read() to fully materialize an uploaded audio file into memory before vLLM checks the documented VLLM_MAX_AUDIO_CLIP_FILESIZE_MB compressed upload size limit (default 25 MB) later in the speech-to-text preprocessing step, so an API caller who can reach those routes can submit an oversized multipart upload and cause vLLM to allocate memory proportional to the uploaded file size before the request is rejected as too large, creating memory pressure or terminating the process depending on deployment resource limits. This issue is fixed in version 0.24.0.


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