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**Name of the Vulnerable Software and Affected Versions** Look 'n' Stop Firewall versions 2.06p4 through 2.07 **Description** The issue allows local users to cause a denial of service, resulting in a system crash. This is achieved by sending a crafted 0x80000064 IOCTL request, which triggers an assertion failure. **Recommendations** For Look 'n' Stop Firewall versions 2.06p4 through 2.07, consider restricting access to the `lnsfw1.sys` driver to minimize the risk of exploitation. As a temporary workaround, avoid using the 0x80000064 IOCTL request until a patch is available. At the moment, there is no information about a newer version that contains a fix for this issue.