CVE-2026-94142 BioStar Temperature Monitor Utility IOCTL BS_HWMIO64_W10.sys sub_1105C write-what-where
A local attacker can exploit a write-what-where vulnerability in the BioStar Temperature Monitor Utility kernel driver to achieve privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-94142?
CVE-2026-94142 is a critical memory corruption vulnerability in BioStar Temperature Monitor Utility, published on 21 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security vulnerability has been detected in BioStar Temperature Monitor Utility 1.2.1806.2200. Affected by this vulnerability is the function sub_1105C of the file BS_HWMIO64_W10.sys of the component IOCTL Handler. Such manipulation of the argument PhysicalAddress leads to write-what-where condition. The attack needs to be performed locally. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-94142?
How do I fix CVE-2026-94142?
No fix has been published for CVE-2026-94142 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-94142 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94142 exists.
Sources
Also known as GHSA-8fx2-frcj-2gw4.