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CVE-2026-94146

BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where

CVSS 4.0 9.3 CRITICALCVSS 3.1 8.8 HIGHCVSS 3.0 8.8 HIGHCVSS 2.0 6.8 Check source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-94146

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-94146

Published

BIOS Update Utility

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "BioStar",
                    "product": "BIOS Update Utility",
                    "versions": [
                        {
                            "version": "1.9.7.3",
                            "status": "affected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:o:biostar:bios_update_utility:*:*:*:*:*:*:*:*"
                    ],
                    "modules": [
                        "IOCTL Handler"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON