CVE-2025-62164Network attack vector

Server crash or code execution via sparse tensor

Published Nov 21, 2025 · Updated Nov 24, 2025

Out-of-bounds write in the vLLM Completions API 0.10.2 through 0.11.0 allows remote attackers to crash the server or execute code. renderer.py decodes a user-supplied prompt embedding, loads it with torch.load while sparse invariant checks are disabled, and calls to_dense on unchecked indices, causing an out-of-bounds memory write. Access to the Completions API is required; a successful write crashes the server process, while reliable code execution has not been demonstrated.

CVSS severity8.8
High
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the vLLM Completions API 0.10.2 through 0.11.0 allows remote attackers to crash the server or execute code. renderer.py decodes a user-supplied prompt embedding, loads it with torch.load while sparse invariant checks are disabled, and calls to_dense on unchecked indices, causing an out-of-bounds memory write. Access to the Completions API is required; a successful write crashes the server process, while reliable code execution has not been demonstrated.

The record

CVE
CVE-2025-62164
Published
Nov 21, 2025
Updated
Nov 24, 2025
Vendor
vLLM Project
Product
vLLM
Classifications
CWE-787, CWE-20, CWE-502, CWE-123, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.10.2, < 0.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

vLLM Project · vLLMversion=>= 0.10.2, < 0.11.1

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-20Improper Input Validation
CWE-502Deserialization of Untrusted Data
CWE-123Write-what-where Condition
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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