OpenBSD isn't vulnerable, from https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion....:

OpenBSD isn't vulnerable, from https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion....: > We have not investigated any other libc or operating system; but OpenBSD is notably not vulnerable, because its SIGALRM handler calls syslog_r(), an async-signal-safer version of syslog() that was invented by OpenBSD in 2001.