From upstream ChangeLog Fixed slapd kbind buffer overflow condition (ITS#4775) Though I can't view the ticket in upstreams tracker and got no response on irc, so can't say something about severity. But as bind is like authentication, it might be something serious
well I got further note from an upstream maintainer now. This is just code provided in the tarball, it isn't compiled in our env, so INVALIDating it