### [CVE-2018-12232](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12232)
![](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)
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### Description

In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/hiboma/hiboma
- https://github.com/shankarapailoor/moonshine