What is CVE-2018-9151?

CVE-2018-9151 is a medium-severity vulnerability in Kingsoft Internet Security 9 Plus, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-03-30.

How severe is CVE-2018-9151?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Kingsoft Internet Security 9 Plus

CVE-2018-9151

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.

Published 2018-03-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Kingsoft Internet Security 9 Plus — versions 2010.06.23.247

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

seclists.org/fulldisclosure/2018/Mar/78 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-9151?: CVE-2018-9151 is a medium-severity vulnerability in Kingsoft Internet Security 9 Plus, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-03-30.
How severe is CVE-2018-9151?: Medium severity. CVSS v3 base score is 5.5 out of 10.