CVE-2026-84286 (GCVE-0-2026-84286)

Vulnerability from cvelistv5 – Published: 2026-10-12 17:01 – Updated: 2026-10-12 17:14
VLAI
Title
OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table
Summary
ExLlamaV3’s EXL3 loader uses an untrusted, model-supplied index to select a CUDA kernel without first verifying that the index is within bounds. A malicious model can force the code to read and invoke an out‑of‑range function pointer, resulting in a reproducible crash. Under specific conditions involving certain host memory layouts, it may be possible for an attacker to exploit this vulnerability to achieve controlled indirect kernel dispatch during model load.
Severity
No CVSS data available.
CWE
Assigner
certcc CNA under the mitre root
CNA scorecard E 42/100 over 153 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Turboderp-org ExLlamaV3 Affected: 3
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-12T17:14:02.436Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.kb.cert.org/vuls/id/369611"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "ExLlamaV3",
          "vendor": "Turboderp-org",
          "versions": [
            {
              "status": "affected",
              "version": "3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ExLlamaV3\u2019s EXL3 loader uses an untrusted, model-supplied index to select a CUDA kernel without first verifying that the index is within bounds. A malicious model can force the code to read and invoke an out\u2011of\u2011range function pointer, resulting in a reproducible crash. Under specific conditions involving certain host memory layouts, it may be possible for an attacker to exploit this vulnerability to achieve controlled indirect kernel dispatch during model load."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-125 Out-of-bounds Read",
              "lang": "en"
            }
          ]
        },
        {
          "descriptions": [
            {
              "description": "CWE-787 Out-of-bounds Write",
              "lang": "en"
            }
          ]
        },
        {
          "descriptions": [
            {
              "description": "CWE-20 Improper Input Validation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-12T17:06:12.603Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://kb.cert.org/vuls/id/369611"
        },
        {
          "url": "https://github.com/turboderp-org/exllamav3/pull/310"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "OOB Read/Write via Negative Array Index in exllamav3_ext Kernel Table",
      "x_generator": {
        "engine": "VINCE 3.0.50",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-84286"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-84286",
    "datePublished": "2026-10-12T17:01:16.032Z",
    "dateReserved": "2026-09-01T15:47:57.172Z",
    "dateUpdated": "2026-10-12T17:14:02.436Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-84286",
      "date": "2026-10-13",
      "epss": "0.00204",
      "percentile": "0.09612"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "ExLlamaV3",
                "vendor": "Turboderp-org",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3"
                  }
                ]
              }
            ],
            "source": "cret@cert.org"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "ExLlamaV3\u2019s EXL3 loader uses an untrusted, model-supplied index to select a CUDA kernel without first verifying that the index is within bounds. A malicious model can force the code to read and invoke an out\u2011of\u2011range function pointer, resulting in a reproducible crash. Under specific conditions involving certain host memory layouts, it may be possible for an attacker to exploit this vulnerability to achieve controlled indirect kernel dispatch during model load."
          }
        ],
        "id": "CVE-2026-84286",
        "lastModified": "2026-10-12T18:17:24.160",
        "metrics": {},
        "published": "2026-10-12T17:17:35.873",
        "references": [
          {
            "source": "cret@cert.org",
            "url": "https://github.com/turboderp-org/exllamav3/pull/310"
          },
          {
            "source": "cret@cert.org",
            "url": "https://kb.cert.org/vuls/id/369611"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.kb.cert.org/vuls/id/369611"
          }
        ],
        "sourceIdentifier": "cret@cert.org",
        "vulnStatus": "Received"
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.