Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service.

CRLF injection vulnerability in the web framework in Cisco Security Manager 4.2 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct redirection attacks via a crafted URL, aka Bug ID CSCun82349.

Multiple TCP implementations with Protection Against Wrapped Sequence Numbers (PAWS) with the timestamps option enabled allow remote attackers to cause a denial of service (connection loss) via a spoofed packet with a large timer value, which causes the host to discard later packets because they appear to be too old.