How severe is CVE-2009-4114?

CVE-2009-4114 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2009-4114 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4114?

CVE-2009-4114 affects Kaspersky Kaspersky Anti-virus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-4114?

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

When was CVE-2009-4114 published?

CVE-2009-4114 was published on 2009-11-30 and last updated on 2026-06-16.

CVE-2009-4114

CVE-2009-4114 is a medium-severity vulnerability in Kaspersky Kaspersky Anti-virus with a CVSS 2.0 base score of 4.9. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Kaspersky Kaspersky Anti-virus
Published: 2009-11-30
Last modified: 2026-06-16

Description

kl1.sys in Kaspersky Anti-Virus 2010 9.0.0.463, and possibly other versions before 9.0.0.736, does not properly validate input to IOCTL 0x0022c008, which allows local users to cause a denial of service (system crash) via IOCTL requests using crafted kernel addresses that trigger memory corruption, possibly related to klavemu.kdl.

Frequently asked questions

What is CVE-2009-4114?: kl1.sys in Kaspersky Anti-Virus 2010 9.0.0.463, and possibly other versions before 9.0.0.736, does not properly validate input to IOCTL 0x0022c008, which allows local users to cause a denial of service (system crash) via IOCTL requests using crafted kernel addresses that trigger memory corruption, possibly related to klavemu.kdl.
How severe is CVE-2009-4114?: CVE-2009-4114 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-2009-4114 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4114?: CVE-2009-4114 affects Kaspersky Kaspersky Anti-virus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4114?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4114 published?: CVE-2009-4114 was published on 2009-11-30 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:kaspersky:kaspersky_anti-virus:9.0.0.463:*:*:*:*:*:*:*

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