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by eugeneionesco 3694 days ago
>If you had the same version of OpenSMTPD running on a generic Linux kernel or on Mac OS X, it was vulnerable

You're completely wrong, stack canaries have nothing to do with kernels, they're a compiler option, gcc has them enabled by default, clang has them enabled by default. So no, running OpenSMTPD on Linux or OS X would not make that vulnerability exploitable.