CVEs-PoC/2017/CVE-2017-18257.md

### [CVE-2017-18257](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18257)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

The __get_data_block function in fs/f2fs/data.c in the Linux kernel before 4.11 allows local users to cause a denial of service (integer overflow and loop) via crafted use of the open and fallocate system calls with an FS_IOC_FIEMAP ioctl.

### POC

#### Reference
- https://usn.ubuntu.com/3696-1/

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