CVE-2026-7141 (GCVE-0-2026-7141)

Vulnerability from cvelistv5 – Published: 2026-04-27 16:45 – Updated: 2026-08-25 19:07 Disputed
VLAI
Title
vLLM KV Block kv_cache_interface.py has_mamba_layers uninitialized resource
Summary
A vulnerability was found in vLLM up to 0.19.0. The affected element is the function has_mamba_layers of the file vllm/v1/kv_cache_interface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. The existence of this vulnerability is still disputed at present. The proposed patch did not fix the issue. A 3rd party explains: "The divergence could be explained by a benign and expected vLLM behavior where vLLM server could group concurrent requests together resulting in different input shapes based on varying request arrival time. The differences in grouped input shapes could call different kernels with could produce difference results due to rounding and differences in order of operations. There is an environment variable VLLM_BATCH_INVARIANT=1 for users that desire to have deterministic output with temperature 0.0."
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 17:41 UTC
CWE
References
URL Tags
https://vuldb.com/vuln/359740 vdb-entrytechnical-description
https://vuldb.com/vuln/359740/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-7141 third-party-advisory
https://vuldb.com/submit/801297 third-party-advisory
https://github.com/vllm-project/vllm/issues/39146 issue-tracking
https://github.com/vllm-project/vllm/issues/39146… exploitissue-tracking
Impacted products
Vendor Product Version CPE status
n/a vLLM Affected: 0.1
Affected: 0.2
Affected: 0.3
Affected: 0.4
Affected: 0.5
Affected: 0.6
Affected: 0.7
Affected: 0.8
Affected: 0.9
Affected: 0.10
Affected: 0.11
Affected: 0.12
Affected: 0.13
Affected: 0.14
Affected: 0.15
Affected: 0.16
Affected: 0.17
Affected: 0.18
Affected: 0.19.0
    cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*
Show details on NVD website

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There is an environment variable VLLM_BATCH_INVARIANT=1 for users that desire to have deterministic output with temperature 0.0.\\\"\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-908\", \"description\": \"Uninitialized Resource\"}]}], \"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-08-25T19:07:56.947Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-7141\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-25T19:07:56.947Z\", \"dateReserved\": \"2026-04-26T19:38:00.529Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-04-27T16:45:12.662Z\", \"assignerShortName\": \"VulDB\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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