cve/2009/CVE-2009-0747.md

### [CVE-2009-0747](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0747)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The ext4_isize function in fs/ext4/ext4.h in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 uses the i_size_high structure member during operations on arbitrary types of files, which allows local users to cause a denial of service (CPU consumption and error-message flood) by attempting to mount a crafted ext4 filesystem.

### POC

#### Reference
- http://bugzilla.kernel.org/show_bug.cgi?id=12375
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9200

#### Github
No PoCs found on GitHub currently.