Linux Kernel GSM 0710 Multiplexer Race Condition Privilege Escalation

This repository contains a local privilege escalation exploit for CVE-2023-6546, targeting a race condition in the n_gsm TTY line discipline in the Linux kernel. The exploit is implemented in a single C file ('exploit.c') and is designed to work on Ubuntu 18.04/20.04, CentOS 8, and RHEL 8 systems with the n_gsm kernel module loaded. The exploit works by orchestrating a complex race condition to achieve a use-after-free (UAF) on a kernel structure, which is then exploited to execute arbitrary code in kernel context. The payload sets the setuid bit on /usr/bin/python3, allowing the attacker to spawn a root shell. The exploit is operational and includes hardcoded payload logic, but is not part of a framework. The only other file is a minimal README. The exploit must be run locally on the target system and does not require network access.