cve/2018/CVE-2018-12232.md

CVE-2018-12232

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