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TI-2026-80198 Aliases CVE-2026-116180GHSA-v8gv-gxpf-cg62

vLLM denial of service lets a client crash the shared engine

Priority LOW 36CWE-908Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-908 and the CVSS impact.

Summary

vLLM from 0.8.5 before 0.31.0 has a denial of service flaw caused by an uninitialized tensor allocation in its logprobs handling (CWE-908). A client with low privileges that shares the engine can trigger an OverflowError that crashes the EngineCore process and drops requests from all other tenants.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

vLLM from 0.8.5 before 0.31.0 has a denial of service flaw. LogprobsTensors.empty_cpu() in vllm/v1/outputs.py allocates an uninitialized int32 tensor, and the V1 model runner leaves prompt positions reported as computed by a KV connector unwritten. A client sharing the engine can send prompt_logprobs (or echo with logprobs) against a connector-cached prefix, making tokenizer decode raise OverflowError, which crashes EngineCore and drops all co-tenant requests.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00254 17th percentileScored 2026-11-07
Fix Partial vllm (vllm-project): 0.31.0Red Hat: 5 advisoriesRed Hat: 1 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vllm-projectvllm0.8.5 to before 0.31.00.31.0Patch availableCNA
  • vllm Vendorvllm-project Affected 0.8.5 to before 0.31.0 Fixed in 0.31.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*0.8.5 to before 0.31.0VulnerablevLLM
  • cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* Versions 0.8.5 to before 0.31.0 Vulnerable ·vLLM

Remediation

Upgrade vLLM to 0.31.0 or later. Red Hat fixes Red Hat AI Inference Server 3.5 in RHSA-2026:94738 (CUDA), RHSA-2026:94721 (Gaudi), RHSA-2026:94717 (Spyre), RHSA-2026:94709 (ROCm) and RHSA-2026:94702 (CPU). Red Hat's plan is none available for Red Hat Enterprise Linux AI (RHEL AI) 3 and Red Hat OpenShift AI (RHOAI).

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA vllm (vllm-project) Fixed in 0.31.0

Red Hat 5 advisories

  • RHSA-2026:94738 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (CUDA)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-cuda-rhel9
  • RHSA-2026:94721 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference Tech Preview 3.5.3 (Gaudi)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-gaudi-rhel9
  • RHSA-2026:94717 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (Spyre)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-spyre-rhel9
Show 2 more Red Hat advisories
  • RHSA-2026:94709 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (ROCm)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-rocm-rhel9
  • RHSA-2026:94702 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (CPU)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-cpu-rhel9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    vllm-project vllm 0.31.0

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-80197 Resource exhaustion in vLLM lets API clients crash the API frontendPriority MEDIUM 44
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AI Inference ServerAffectedNo fix yet
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat AI Inference Server 3.5Fixed RHSA-2026:94702, RHSA-2026:94709, RHSA-2026:94717, RHSA-2026:94721, RHSA-2026:94738
Not affected: 1 product
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-25 Threatist record created from CVE-2026-116180
  2. 2026-10-25 Affected versions changed · Red Hat
  3. 2026-10-25 CVSS score added · Red Hat
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: MEDIUM → LOW
  6. 2026-10-27 Alias added: GHSA-v8gv-gxpf-cg62
  7. 2026-10-30 Affected versions changed · Red Hat
  8. 2026-11-04 Fix available: RHSA-2026:94717 · Red Hat
  9. 2026-11-04 Fix available: RHSA-2026:94709 · Red Hat
  10. 2026-11-04 Fix available: RHSA-2026:94738 · Red Hat
  11. 2026-11-04 Fix available: RHSA-2026:94702 · Red Hat
  12. 2026-11-04 Fix available: RHSA-2026:94721 · Red Hat
  13. 2026-11-04 Fix available: Red Hat AI Inference Server 3.5 · Red Hat

References

Advisory 1

  • TI-2024-10229 Remote Code Execution in vllm-project/vllm CVSS 3.0CRITICAL 9.8
  • TI-2024-08404 Remote Code Execution in vllm-project/vllm CVSS 3.1CRITICAL 9.8
  • TI-2026-36017 vLLM: OpenAI auth bypass CVSS 3.1CRITICAL 9.1
  • TI-2026-63056 vLLM before 0.28.0 Denial of Service via negative token ID CVSS 4.0HIGH 8.7
  • TI-2026-04308 Hardcoded trust_remote_code=True in vllm-project/vllm Bypasses User Security Control CVSS 3.0HIGH 8.8
  • TI-2026-39137 vLLM: Remote DoS in vLLM via Invalid Recovered Token Reinjection CVSS 3.1HIGH 7.5
See all 124 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences