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A NULL pointer dereference bug in the function ObReferenceObjectByHandle in the Kingsoft Internet Security 9+ kernel driver KWatch3.sys allows local non-privileged users to crash the system via IOCTL 0x80030030.
Use CWE-476, Kingsoft vendor hub and Internet Security 9 Plus product page to widen CVE-2018-9151 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2022-25949 for nearby disclosures in the same product family. Additional editorial context is available in Cybersecurity Weekly Roundup: April 27, 2026 — Critical Zero-Days and Framework Failures.