cve/2019/CVE-2019-19318.md

### [CVE-2019-19318](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19318)
![](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

In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,

### POC

#### Reference
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318
- https://usn.ubuntu.com/4414-1/

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