In FreeBSD before 11.2-RELEASE, a stack guard-page is available but is disabled by default. This results in the possibility a poorly written process could be cause a stack overflow.
[
{
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"status": "affected",
"version": "before 11.2-RELEASE"
}
]
}
]