cve/2018/CVE-2018-13093.md

### [CVE-2018-13093](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-13093)
![](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 fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.

### POC

#### Reference
- https://bugzilla.kernel.org/show_bug.cgi?id=199367
- https://bugzilla.kernel.org/show_bug.cgi?id=199367
- https://usn.ubuntu.com/4118-1/
- https://usn.ubuntu.com/4118-1/

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