cve/2019/CVE-2019-19448.md

### [CVE-2019-19448](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19448)
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### Description

In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.

### POC

#### Reference
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448

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