cve/2018/CVE-2018-14613.md

### [CVE-2018-14613](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14613)
![](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

An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in io_ctl_map_page() when mounting and operating a crafted btrfs image, because of a lack of block group item validation in check_leaf_item in fs/btrfs/tree-checker.c.

### POC

#### Reference
- https://bugzilla.kernel.org/show_bug.cgi?id=199849
- https://usn.ubuntu.com/3932-1/
- https://usn.ubuntu.com/4118-1/
- https://www.oracle.com/security-alerts/cpuApr2021.html

#### Github
- https://github.com/ARPSyndicate/cvemon