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

Source: https://junglewise.ai/threats/cve-2026-90485-iobit-uninstaller-null-pointer-dereference-in-ioctl-handler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-12. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/uninstaller). Vendors: [IObit](https://junglewise.ai/threats/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

- [https://vuldb.com/cve/CVE-2026-90485](https://vuldb.com/cve/CVE-2026-90485)
- [https://vuldb.com/submit/887954](https://vuldb.com/submit/887954)

## Related threats

- [IObit Uninstaller privilege escalation in IOCTL handler](https://junglewise.ai/threats/cve-2026-82670-iobit-uninstaller-privilege-escalation-in-ioctl-handler)
- [IObit Uninstaller unquoted service path in IObitUnSvr](https://junglewise.ai/threats/cve-2020-37223-iobit-uninstaller-unquoted-service-path-in-iobitunsvr)