{"id":"CVE-2021-3861","aliases":["EUVD-2021-27098","UBUNTU-CVE-2021-3861"],"status":"published","title":"The RNDIS USB device class includes a buffer overflow vulnerability","description":"The RNDIS USB device class includes a buffer overflow vulnerability. Zephyr versions \u003e= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00479,"percentile":0.41853,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2022-02-07T22:00:13Z","modified":"2026-10-17T12:55:46Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1","3.1.2-1build1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1build1","3.1.2-1build2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1build3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1build3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1.1","3.1.2-1.1build1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1.1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-4"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"zephyr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1.1build1","3.1.2-4"]}],"products":[{"vendor":"zephyrproject","product":"zephyr"},{"vendor":"zephyrproject-rtos","product":"zephyr"}],"references":[{"url":"http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","report"]},{"url":"https://ubuntu.com/security/CVE-2021-3861","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3861","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-3861","title":"The RNDIS USB device class includes a buffer overflow vulnerability","description":"The RNDIS USB device class includes a buffer overflow vulnerability. Zephyr versions \u003e= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj","status":"published","published":"2022-02-07T22:00:13.805Z","modified":"2024-09-16T16:18:17.167Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-27098","description":"The RNDIS USB device class includes a buffer overflow vulnerability. Zephyr versions \u003e= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). 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For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj","status":"published","published":"2022-02-07T22:15:08.423Z","modified":"2026-06-17T04:05:54.823Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:07:04.178977Z"}],"osv":[{"id":"UBUNTU-CVE-2021-3861","description":"The RNDIS USB device class includes a buffer overflow vulnerability. Zephyr versions \u003e= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). 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