Buffer overflow in Biostar Bios Update Utility
CVE-2026-94146
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Biostar Bios Update Utility — versions 1.9.7.3
Weakness classification (CWE)
References
- vuldb.com/cve/CVE-2026-94146 (third-party-advisory)
- vuldb.com/submit/894066 (third-party-advisory)
- vuldb.com/vuln/408061 (technical-description, vdb-entry)
- vuldb.com/vuln/408061/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-94146?
- CVE-2026-94146 is a high-severity vulnerability in Biostar Bios Update Utility, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-09-21.
- How severe is CVE-2026-94146?
- High severity. CVSS v3 base score is 8.8 out of 10.