{"id":"CVE-2026-119955","aliases":["EUVD-2026-122449","GHSA-rqvg-4mf9-v353"],"status":"published","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Uncontrolled resource consumption in Windows Hyper-V allows an authorized attacker to deny service locally.","severity":{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00412,"percentile":0.3601,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-401"],"published":"2026-11-10T18:23:43Z","modified":"2026-11-10T21:33:46Z","products":[{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows 11 version 26h2"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119955","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119955"},{"url":"https://github.com/advisories/GHSA-rqvg-4mf9-v353"}],"sources":{"cve":[{"id":"CVE-2026-119955","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Uncontrolled resource consumption in Windows Hyper-V allows an authorized attacker to deny service locally.","status":"published","published":"2026-11-10T18:23:43.51Z","modified":"2026-11-12T15:48:42.51Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-401"],"updated_at":"2026-11-10T19:39:58.973959Z"}],"euvd":[{"id":"EUVD-2026-122449","description":"Uncontrolled resource consumption in Windows Hyper-V allows an authorized attacker to deny service locally.","status":"published","published":"2026-11-10T18:23:43Z","modified":"2026-11-12T15:48:42Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-11T00:25:03.169314Z"}],"ghsa":[{"id":"GHSA-rqvg-4mf9-v353","title":"Uncontrolled resource consumption in Windows Hyper-V allows an authorized attacker to deny...","description":"Uncontrolled resource consumption in Windows Hyper-V allows an authorized attacker to deny service locally.","status":"published","published":"2026-11-10T21:33:39Z","modified":"2026-11-10T21:33:46Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-401"],"updated_at":"2026-11-10T21:57:54.561479Z"}],"nvd":[{"id":"CVE-2026-119955","description":"Uncontrolled resource consumption in Windows Hyper-V allows an authorized attacker to deny service locally.","status":"published","published":"2026-11-10T19:20:19.503Z","modified":"2026-11-10T19:20:19.633Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-401"],"updated_at":"2026-11-10T22:21:33.392456Z"}]}}