Read the docs
TI-2019-04549 Aliases CVE-2019-6492GHSA-8q26-hf33-vm3w

SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool…

Priority LOW 25CWE-401Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-401.

Summary

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.

Why it matters now

EPSS 0.00459 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:iobit:smart_defrag:6.0:*:*:*:*:*:*:*6.0VulnerableIObit
  • cpe:2.3:a:iobit:smart_defrag:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·IObit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-6492
  2. 2026-10-03 Alias added: GHSA-8q26-hf33-vm3w

References

Exploit 1

  • TI-2019-04550 SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool… CVSS 3.0MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences