How severe is CVE-2018-9151?

CVE-2018-9151 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-9151 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9151?

CVE-2018-9151 affects Kingsoft Internet Security 9 Plus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9151?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-9151 published?

CVE-2018-9151 was published on 2018-03-30 and last updated on 2026-06-17.

CVE-2018-9151

CVE-2018-9151 is a medium-severity vulnerability in Kingsoft Internet Security 9 Plus with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Kingsoft Internet Security 9 Plus
Published: 2018-03-30
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-9151?: CVE-2018-9151 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-9151 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9151?: CVE-2018-9151 affects Kingsoft Internet Security 9 Plus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9151?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-9151 published?: CVE-2018-9151 was published on 2018-03-30 and last updated on 2026-06-17.

References

http://seclists.org/fulldisclosure/2018/Mar/78

Affected products (1)

cpe:2.3:a:kingsoft:internet_security_9_plus:2010.06.23.247:*:*:*:*:*:*:*

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