CVE-2019-6493

MEDIUM

IObit Smart Defrag - Use-After-Free via SmartDefragDriver.sys IOCTL 0x9C401CC0

Title source: llm

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 0x9C401CC0 is called. This kernel pointer can be leaked if the kernel pool becomes a "big" pool.

References (2)

Core 2

Core References

Exploit, Vendor Advisory x_refsource_misc

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

Product, Vendor Advisory x_refsource_misc

https://www.iobit.com/en/iobitsmartdefrag.php

Scores

CVSS v3 5.5

EPSS 0.0049

EPSS Percentile 38.4%

Attack Vector LOCAL

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-401

Status published

Products (1)

iobit/smart_defrag 6

Published Apr 11, 2019

Tracked Since Feb 18, 2026