cve/2018/CVE-2018-1095.md

### [CVE-2018-1095](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1095)
![](https://img.shields.io/static/v1?label=Product&message=Linux%20kernel%20through%20version%204.15&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20Linux%20kernel%20through%20version%204.15%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=NULL%20pointer%20dereference&color=brighgreen)

### Description

The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.

### POC

#### Reference
- https://bugzilla.kernel.org/show_bug.cgi?id=199185
- https://bugzilla.kernel.org/show_bug.cgi?id=199185

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