CVE-2026-90485: IOBit Uninstaller null pointer dereference in IOCTL handler

CVE-2026-90485 · Severity: medium · CVSS 5.5 · Published 2026-09-12

IOBit Uninstaller is a Windows utility that removes software applications. A flaw in the IOCTL dispatch handler of the IURegistryFilter.sys driver can cause the program to crash when handling specially crafted requests from a local user, disrupting system stability and availability.

Technologies: IObit Uninstaller. Vendors: IObit.

Quick answers

Is CVE-2026-90485 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-90485 being exploited in the wild.
How severe is CVE-2026-90485?
Medium severity, with a CVSS score of 5.5, published 12 September 2026.
Which products and versions are affected?
IObit Uninstaller 15.5.0.11.
Is there a fix for CVE-2026-90485?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-90485 attacked?
It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-90485?
Check whether you run IObit Uninstaller at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A null pointer dereference vulnerability exists in the function sub_11838 of IURegistryFilter.sys, a kernel-mode driver component responsible for handling I/O control (IOCTL) requests. The vulnerability is triggered when malformed IOCTL requests are sent to the driver, causing a null pointer dereference that crashes the affected process. The attack requires local access to the system and user-level privileges to invoke the vulnerable IOCTL handler. Exploitation results in denial of service through a system crash or driver crash. The vendor has not released a patch and did not respond to early disclosure notifications.

Affected products

  • IOBit Uninstaller 15.5.0.11

Timeline

  • 2026-09-12: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.