# cve-2024-6387-poc > a signal handler race condition in OpenSSH's server (sshd) - 7etsuo ## Description An exploit for CVE-2024-6387, targeting a signal handler race condition in OpenSSH's server (`sshd`) on glibc-based Linux systems. The vulnerability allows for remote code execution as root due to async-signal-unsafe functions being called in the `SIGALRM` handler. ## Exploit Details ### Vulnerability Summary The exploit targets the `SIGALRM` handler race condition in OpenSSH's `sshd`: - **Affected Versions**: OpenSSH 8.5p1 to 9.8p1. - **Exploit**: Remote code execution as root due to the vulnerable `SIGALRM` handler calling async-signal-unsafe functions.