View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2016-5696 medium priority: Ubuntu including 27 source packages (linux, linux-armadaxp, …), 185 status rows across 7 suites (precise, trusty, upstream, wily, xenial, yakkety, zesty): DNE 120, released 37, not-affected 15, ignored 13.
net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments, which makes it easier for remote attackers to hijack TCP sessions via a blind in-window attack.