vLLM through 0.29.0 fails to validate the tp_size parameter in kv_transfer_params on OpenAI-compatible completion endpoints, allowing attackers to allocate unbounded memory. Attackers can supply arbitrary tp_size values in prefill/decode disaggregated deployments to exhaust memory and trigger kernel OOM-kill of the decode worker process.
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Affected Vendors & Products
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 21 Sep 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | vLLM through 0.29.0 fails to validate the tp_size parameter in kv_transfer_params on OpenAI-compatible completion endpoints, allowing attackers to allocate unbounded memory. Attackers can supply arbitrary tp_size values in prefill/decode disaggregated deployments to exhaust memory and trigger kernel OOM-kill of the decode worker process. | |
| Title | vLLM through 0.29.0 Memory Exhaustion via Unvalidated NIXL tp_size | |
| First Time appeared |
Vllm
Vllm vllm |
|
| Weaknesses | CWE-789 | |
| CPEs | cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vllm
Vllm vllm |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-21T22:04:15.352Z
Reserved: 2026-09-21T21:42:28.781Z
Link: CVE-2026-94626
No data.
Status : Received
Published: 2026-09-21T22:17:01.587
Modified: 2026-09-21T22:17:01.587
Link: CVE-2026-94626
No data.
OpenCVE Enrichment
Updated: 2026-09-22T02:30:06Z
Weaknesses