How severe is CVE-2019-6492?

CVE-2019-6492 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 high, integrity none, and availability none.

Is CVE-2019-6492 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6492?

CVE-2019-6492 affects Iobit Smart Defrag. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-6492?

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

When was CVE-2019-6492 published?

CVE-2019-6492 was published on 2019-03-21 and last updated on 2026-06-17.

CVE-2019-6492

CVE-2019-6492 is a medium-severity vulnerability in Iobit Smart Defrag 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-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Iobit Smart Defrag
Published: 2019-03-21
Last modified: 2026-06-17

Description

SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool that is allocated with user defined bytes and size when IOCTL 0x9C401CC4 is called. This kernel pointer can be leaked if the kernel pool becomes a "big" pool.

Frequently asked questions

What is CVE-2019-6492?: SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool that is allocated with user defined bytes and size when IOCTL 0x9C401CC4 is called. This kernel pointer can be leaked if the kernel pool becomes a "big" pool.
How severe is CVE-2019-6492?: CVE-2019-6492 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 high, integrity none, and availability none.
Is CVE-2019-6492 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-6492?: CVE-2019-6492 affects Iobit Smart Defrag. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-6492?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-6492 published?: CVE-2019-6492 was published on 2019-03-21 and last updated on 2026-06-17.

References

https://downwithup.github.io/CVEPosts.html

Affected products (1)

cpe:2.3:a:iobit:smart_defrag:6.0:*:*:*:*:*:*:*

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