{"id":"CVE-2019-9183","aliases":["EUVD-2019-18561","GHSA-p39c-5r3h-6j6m"],"status":"published","title":"An issue was discovered in Contiki-NG through 4.2 and Contiki through 3.0. A buffer overflow is...","description":"An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.","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":"2026-11-08","score":0.02312,"percentile":0.83509,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190","CWE-191","CWE-787"],"published":"2020-04-23T12:33:37Z","modified":"2026-06-17T02:43:18Z","products":[{"vendor":"contiki-ng","product":"contiki-ng"},{"vendor":"contiki-os","product":"contiki"}],"references":[{"url":"https://github.com/contiki-ng/contiki-ng/pull/972","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory"]},{"url":"https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Third Party Advisory"]},{"url":"https://www.usenix.org/system/files/sec20summer_clements_prepub.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9183"},{"url":"https://github.com/advisories/GHSA-p39c-5r3h-6j6m"}],"sources":{"cve":[{"id":"CVE-2019-9183","description":"An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.","status":"published","published":"2020-04-23T12:33:37Z","modified":"2024-08-04T21:38:46.571Z","updated_at":"2026-11-02T14:20:20.081405Z"}],"euvd":[{"id":"EUVD-2019-18561","description":"An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.","status":"published","published":"2020-04-23T12:33:37Z","modified":"2024-08-04T21:38:46Z","updated_at":"2026-11-03T03:06:39.848951Z"}],"ghsa":[{"id":"GHSA-p39c-5r3h-6j6m","title":"An issue was discovered in Contiki-NG through 4.2 and Contiki through 3.0. A buffer overflow is...","description":"An issue was discovered in Contiki-NG through 4.2 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.","status":"published","published":"2022-05-24T17:16:16Z","modified":"2023-01-29T05:02:40Z","cwes":["CWE-190"],"updated_at":"2026-11-02T14:45:08.540426Z"}],"nvd":[{"id":"CVE-2019-9183","description":"An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.","status":"published","published":"2020-04-23T15:15:13.95Z","modified":"2026-06-17T02:43:18.26Z","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:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-191","CWE-787"],"updated_at":"2026-11-02T14:05:46.451008Z"}]}}