by Kastro
Paper/Archive/CVE-2026-94146

CVE-2026-94146

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

EPSS 0.2%CVSS 9.3
critical.is priorityof 100
30
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 7.8.078 × 201.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
BIOS Update Utility1.9.7.3–CNA

Scores by source

VulDB (CNA)9.3CVSS: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
VulDB (CNA)8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
VulDB (CNA)8.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

writeupvuldb.com/vuln/408061refvuldb.com/vuln/408061/ctiwriteupvuldb.com/cve/CVE-2026-94146writeupvuldb.com/submit/894066