{"id":"CVE-2016-5696","details":"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.","modified":"2026-04-16T06:16:53.374518927Z","published":"2016-08-06T20:59:05.690Z","related":["SUSE-SU-2016:2245-1","SUSE-SU-2016:2912-1","SUSE-SU-2016:2976-1","SUSE-SU-2016:3069-1","SUSE-SU-2016:3304-1","SUSE-SU-2017:0437-1","SUSE-SU-2017:0471-1","SUSE-SU-2017:1102-1"],"references":[{"type":"WEB","url":"https://security.paloaltonetworks.com/CVE-2016-5696"},{"type":"WEB","url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10167"},{"type":"WEB","url":"http://www.securitytracker.com/id/1036625"},{"type":"WEB","url":"http://www.securityfocus.com/bid/91704"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2016/07/12/2"},{"type":"ADVISORY","url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3070-4"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1633.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1664.html"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3071-2"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1631.html"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3070-2"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3071-1"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1632.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1657.html"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3070-3"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3072-2"},{"type":"ADVISORY","url":"https://www.arista.com/en/support/advisories-notices/security-advisories/1461-security-advisory-23"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3072-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3070-1"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1814.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1815.html"},{"type":"ADVISORY","url":"http://source.android.com/security/bulletin/2016-10-01.html"},{"type":"ADVISORY","url":"http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1939.html"},{"type":"ADVISORY","url":"https://bto.bluecoat.com/security-advisory/sa131"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1354708"},{"type":"FIX","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758"},{"type":"ARTICLE","url":"http://www.prnewswire.com/news-releases/mitnick-attack-reappears-at-geekpwn-macau-contest-300270779.html"},{"type":"ARTICLE","url":"https://www.usenix.org/system/files/conference/usenixsecurity16/sec16_paper_cao.pdf"},{"type":"EVIDENCE","url":"https://github.com/Gnoxter/mountain_goat"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","events":[{"introduced":"0"},{"last_affected":"c16fa4f2ad19908a47c63d8fa436a1178438c7e7"},{"introduced":"0"},{"last_affected":"76e10d158efb6d4516018846f60c2ab5501900bc"},{"fixed":"75ff39ccc1bd5d3c455b6822ab09e533c551f758"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"3.3"},{"introduced":"0"},{"last_affected":"3.4"}]}},{"type":"GIT","repo":"https://github.com/torvalds/linux","events":[{"introduced":"0"},{"fixed":"75ff39ccc1bd5d3c455b6822ab09e533c551f758"}]}],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"4.6.6"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-5696.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"}]}