{"id":"CVE-2020-13986","aliases":["EUVD-2020-6156","GHSA-63p4-w7wr-6hxg"],"status":"published","title":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack...","description":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.03051,"percentile":0.87675,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-835"],"published":"2020-12-11T21:36:06Z","modified":"2026-06-17T02:54:03Z","products":[{"vendor":"contiki-os","product":"contiki"}],"references":[{"url":"https://www.kb.cert.org/vuls/id/815128","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-13986"},{"url":"https://github.com/advisories/GHSA-63p4-w7wr-6hxg"}],"sources":{"cve":[{"id":"CVE-2020-13986","description":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.","status":"published","published":"2020-12-11T21:36:06Z","modified":"2024-08-04T12:32:14.465Z","updated_at":"2026-11-02T14:35:54.170199Z"}],"euvd":[{"id":"EUVD-2020-6156","description":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.","status":"published","published":"2020-12-11T21:36:06Z","modified":"2024-08-04T12:32:14Z","updated_at":"2026-11-03T03:07:35.697348Z"}],"ghsa":[{"id":"GHSA-63p4-w7wr-6hxg","title":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack...","description":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.","status":"published","published":"2022-05-24T17:35:59Z","modified":"2023-01-29T05:04:55Z","cwes":["CWE-835"],"updated_at":"2026-11-02T14:45:40.253766Z"}],"nvd":[{"id":"CVE-2020-13986","description":"An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.","status":"published","published":"2020-12-11T22:15:12.497Z","modified":"2026-06-17T02:54:03.28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:06:27.10541Z"}]}}