CVE-2026-90508: Chengdu Qilu Technology Ludashi Message Dispatch ProtectFilter64.sys MessageNotifyCallback authorization
A security flaw has been discovered in Chengdu Qilu Technology Ludashi 6.1026.4715.714. Affected by this vulnerability is the function MessageNotifyCallback in the library ProtectFilter64.sys of the component Message Dispatch Handler. Performing a manipulation results in missing authorization. Attacking locally is a requirement. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
The reported affected installation is Chengdu Qilu Technology Ludashi version 6.1026.4715.714, specifically its Message Dispatch Handler component and ProtectFilter64.sys driver.
What access does an attacker need?
Exploitation requires local access and high privileges. The reported CVSS vector does not indicate any user interaction requirement.
Is exploitation likely to be practical?
A public exploit has been released and may be used in attacks. Organizations running the reported version should treat local high-privilege abuse as a realistic concern.
How can I check whether a system is potentially affected?
Identify systems running Chengdu Qilu Technology Ludashi and verify whether they are version 6.1026.4715.714. Also confirm whether the Message Dispatch Handler includes the ProtectFilter64.sys component.