{"id":"CVE-2021-42274","aliases":["EUVD-2021-29250","GHSA-pxcr-f852-7w3r"],"status":"published","title":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","description":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0069,"percentile":0.53222,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-11-10T00:46:57Z","modified":"2026-08-19T18:32:46Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 2004"},{"vendor":"microsoft","product":"windows 10 version 21h1"},{"vendor":"microsoft","product":"windows 11 version 21h2"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_11"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42274","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42274","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42274"},{"url":"https://github.com/advisories/GHSA-pxcr-f852-7w3r"}],"sources":{"cve":[{"id":"CVE-2021-42274","title":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","description":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","status":"published","published":"2021-11-10T00:46:57Z","modified":"2026-08-19T16:26:59.157Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29250","description":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","status":"published","published":"2021-11-10T00:46:57Z","modified":"2026-08-19T16:26:59Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:01:43.792814Z"}],"ghsa":[{"id":"GHSA-pxcr-f852-7w3r","title":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","description":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","status":"published","published":"2022-05-24T19:20:23Z","modified":"2026-08-19T18:32:46Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:10:43.503566Z"}],"nvd":[{"id":"CVE-2021-42274","description":"Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability","status":"published","published":"2021-11-10T01:19:43.317Z","modified":"2026-08-19T17:17:57.77Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:07:00.984108Z"}]}}