A maliciously constructed HTTP/2 request could cause mod_http2 in Apache HTTP Server 2.4.24, 2.4.25 to dereference a NULL pointer and crash the server process.
https://security.gentoo.org/glsa/201710-32
https://access.redhat.com/errata/RHSA-2017:2483
http://www.securitytracker.com/id/1038711