{"id":"CVE-2015-5879","aliases":["EUVD-2015-5825","GHSA-jcjc-m39p-5c5c"],"status":"published","title":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets,...","description":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets, which allows remote attackers to bypass the sequence-number protection mechanism and cause a denial of service (TCP connection disruption) via a crafted header.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0244,"percentile":0.84417,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2015-09-18T10:00:00Z","modified":"2026-06-17T00:29:56Z","products":[{"vendor":"apple","product":"iphone_os"},{"vendor":"apple","product":"mac_os_x"}],"references":[{"url":"http://www.securitytracker.com/id/1033609","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://support.apple.com/HT205212","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/76764","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://support.apple.com/HT205267","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-5879"},{"url":"https://github.com/advisories/GHSA-jcjc-m39p-5c5c"}],"sources":{"cve":[{"id":"CVE-2015-5879","description":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets, which allows remote attackers to bypass the sequence-number protection mechanism and cause a denial of service (TCP connection disruption) via a crafted header.","status":"published","published":"2015-09-18T10:00:00Z","modified":"2024-08-06T07:06:34.336Z","updated_at":"2026-11-02T14:35:40.217028Z"}],"euvd":[{"id":"EUVD-2015-5825","description":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets, which allows remote attackers to bypass the sequence-number protection mechanism and cause a denial of service (TCP connection disruption) via a crafted header.","status":"published","published":"2015-09-18T10:00:00Z","modified":"2024-08-06T07:06:34Z","updated_at":"2026-11-03T02:21:58.196951Z"}],"ghsa":[{"id":"GHSA-jcjc-m39p-5c5c","title":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets,...","description":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets, which allows remote attackers to bypass the sequence-number protection mechanism and cause a denial of service (TCP connection disruption) via a crafted header.","status":"published","published":"2022-05-17T03:19:08Z","modified":"2023-01-27T05:07:12Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:43:04.442683Z"}],"nvd":[{"id":"CVE-2015-5879","description":"XNU in the kernel in Apple iOS before 9 does not properly validate the headers of TCP packets, which allows remote attackers to bypass the sequence-number protection mechanism and cause a denial of service (TCP connection disruption) via a crafted header.","status":"published","published":"2015-09-18T12:00:18.653Z","modified":"2026-06-17T00:29:56.567Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:03:09.92183Z"}]}}