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CVE-2026-69147— vLLM: Request-selected PyNvVideoCodec GPU decode bypasses static VRAM reservation

Quick assessment

Affected
vllm-project vllm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

vLLM is an inference and serving engine for large language models. Prior to 0.28.0, request bodies for Chat Completions and Responses can set media_io_kwargs.video.video_backend to pynvvideocodec, and MediaConnector.fetch_video forwards that choice to VideoMed

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
vllm-project vllm < 0.28.0 affected
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I. Basic Information for CVE-2026-69147

Vulnerability Information

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Vulnerability Title
vLLM: Request-selected PyNvVideoCodec GPU decode bypasses static VRAM reservation
Source: CVE Program / CVE List V5
Vulnerability Description
vLLM is an inference and serving engine for large language models. Prior to 0.28.0, request bodies for Chat Completions and Responses can set media_io_kwargs.video.video_backend to pynvvideocodec, and MediaConnector.fetch_video forwards that choice to VideoMediaIO even when startup configuration selected a software decoder. The engine's _reserve_mm_ipc_gpu_memory logic budgets decoder memory only from static configuration, so the request-selected VIDEO_LOADER_REGISTRY backend can create a CUDA context, decoder surfaces, and decoded-frame allocations that were not removed from the engine's KV-cache budget. An attacker able to submit video requests to a video-capable GPU deployment with PyNvVideoCodec installed can exhaust shared GPU memory, causing request failures, worker crashes, or denial of service. The first release containing the fix is version 0.28.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vllm-project vllm < 0.28.0 -

II. Public POCs for CVE-2026-69147

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III. Intelligence Information for CVE-2026-69147

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Patches & Fixes for CVE-2026-69147 (3)

Other References for CVE-2026-69147 (1)

Same Patch Batch · vllm-project · 2026-09-16 · 4 CVEs total

CVE-2026-57173 6.5 MEDIUM vLLM: Unauthenticated audio decompression-bomb DoS in /v1/chat/completions
CVE-2026-92220 5.3 MEDIUM vllm-project vLLM MoRIIO Acknowledgement moriio_connector.py MoRIIOWrapper._handle_release
CVE-2026-92365 4.3 MEDIUM vllm-project vllm thinking_budget_state.py algorithmic complexity

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-400

V. Comments for CVE-2026-69147

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