CVE-2026-94146 (GCVE-0-2026-94146)

Vulnerability from cvelistv5 – Published: 2026-09-21 07:00 – Updated: 2026-09-21 07:00
VLAI
Title
BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where
Summary
A vulnerability was found in BioStar BIOS Update Utility 1.9.7.3. This issue affects the function sub_110BC of the file BSMEM64_W10.sys of the component IOCTL Handler. The manipulation of the argument PhysicalAddress/Size results in write-what-where condition. Attacking locally is a requirement. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
8.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/408061 vdb-entrytechnical-description
https://vuldb.com/vuln/408061/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-94146 third-party-advisory
https://vuldb.com/submit/894066 third-party-advisory
Impacted products
Vendor Product Version CPE status
BioStar BIOS Update Utility Affected: 1.9.7.3
    cpe:2.3:o:biostar:bios_update_utility:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Bigcat (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
  "containers": {
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      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:biostar:bios_update_utility:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "IOCTL Handler"
          ],
          "product": "BIOS Update Utility",
          "vendor": "BioStar",
          "versions": [
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              "status": "affected",
              "version": "1.9.7.3"
            }
          ]
        }
      ],
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          "type": "reporter",
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        },
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        }
      ],
      "metrics": [
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        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
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          "name": "VDB-408061 | BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where",
          "tags": [
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          "tags": [
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          "url": "https://vuldb.com/cve/CVE-2026-94146"
        },
        {
          "name": "Submit #894066 | BIOSTAR Group BIOS Update Utility 1.9.7.3 Arbitrary Kernel Memory Read/Write",
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          "url": "https://vuldb.com/submit/894066"
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          "time": "2026-09-20T02:00:00.000Z",
          "value": "VulDB entry created"
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          "lang": "en",
          "time": "2026-09-20T22:36:15.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where",
      "x_generator": [
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    }
  },
  "cveMetadata": {
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    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-94146",
    "datePublished": "2026-09-21T07:00:09.909Z",
    "dateReserved": "2026-09-20T20:31:10.779Z",
    "dateUpdated": "2026-09-21T07:00:09.909Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
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                  "cpe:2.3:o:biostar:bios_update_utility:*:*:*:*:*:*:*:*"
                ],
                "modules": [
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                ],
                "product": "BIOS Update Utility",
                "vendor": "BioStar",
                "versions": [
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                    "version": "1.9.7.3"
                  }
                ]
              }
            ],
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        ],
        "cveTags": [],
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          {
            "lang": "en",
            "value": "A vulnerability was found in BioStar BIOS Update Utility 1.9.7.3. This issue affects the function sub_110BC of the file BSMEM64_W10.sys of the component IOCTL Handler. The manipulation of the argument PhysicalAddress/Size results in write-what-where condition. Attacking locally is a requirement. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way."
          }
        ],
        "id": "CVE-2026-94146",
        "lastModified": "2026-09-21T07:16:53.993",
        "metrics": {
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              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
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          "cvssMetricV40": [
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                "Recovery": "NOT_DEFINED",
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                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "PROOF_OF_CONCEPT",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
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                "subConfidentialityImpact": "HIGH",
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                "valueDensity": "NOT_DEFINED",
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                "vulnIntegrityImpact": "HIGH",
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    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.