{"id":"CVE-2026-95913","kind":"vulnerability","aliases":["CVE-2026-95913"],"related":[],"title":"Windows Hyper-V: use-after-free lets network attacker crash service","description":"Use after free in Windows Hyper-V allows an unauthorized attacker to deny service over a network.","summary":"A use-after-free bug in Windows Hyper-V lets an unauthorized attacker over the network cause a denial of service. The sources do not describe code execution or data access.","severity":"medium","cvss":5.9,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Hyper-V","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["hyper-v","infrastructure","windows","windows-server"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:21:44+00:00","first_seen_at":"2026-11-10T19:25:23+00:00","triaged_at":"2026-11-10T19:59:50+00:00","updated_at":"2026-11-10T19:59:50+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:59:50Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Hyper-V: use-after-free lets network attacker crash service","impact":"low","summary":"A use-after-free bug in Windows Hyper-V lets an unauthorized attacker over the network cause a denial of service. The sources do not describe code execution or data access.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","hyper-v","windows-server"],"confidence":0.6,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Hyper-V service crashes, causing denial of service over the network.","analyst_note":"Check the Microsoft Security Response Center advisory for CVE-2026-95913 for affected builds, required roles and the patch.","how_to_check":"unknown","plain_action":"","product_name":"Windows Hyper-V","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Hyper-V is the Windows virtualization role used on Windows Server and Windows client machines that run virtual machines. The sources do not say which Hyper-V configurations or network exposures are needed to reach the flaw, so unknown.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000675,"input_tokens":4481,"output_tokens":453,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-95913':16A,19A 'access':64B 'allow':73C 'attack':11A,46B,76C 'bug':37B 'caus':50B 'code':60B 'crash':12A 'cve':14A,17A 'data':63B 'deni':78C 'denial':52B 'describ':59B 'execut':61B 'free':8A,36B,67C 'hyper':3A,22A,25B,41B,71C 'hyper-v':2A,21A,24B,40B,70C 'infrastructur':27B 'let':9A,43B 'network':10A,49B,82C 'server':31B 'servic':13A,54B,79C 'sourc':56B 'unauthor':45B,75C 'use':6A,34B,65C 'use-after-fre':5A,33B 'v':4A,23A,26B,42B,72C 'window':1A,28B,30B,39B,69C 'windows':20A 'windows-serv':29B","nicknames":[],"mitigations":[],"who_affected":"Hyper-V is the Windows virtualization role used on Windows Server and Windows client machines that run virtual machines. The sources do not say which Hyper-V configurations or network exposures are needed to reach the flaw, so unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["hyperv","windowshyperv"],"ptokens":["hyper","windows"],"labels":["hyperv","infrastructure","medium","vendor","windows","windowsserver"],"campaign_type":null,"search_a":"'-2026':15A,18A '-95913':16A,19A 'attack':11A 'crash':12A 'cve':14A,17A 'free':8A 'hyper':3A,22A 'hyper-v':2A,21A 'let':9A 'network':10A 'servic':13A 'use':6A 'use-after-fre':5A 'v':4A,23A 'window':1A 'windows':20A","search_b":"'access':64B 'attack':46B 'bug':37B 'caus':50B 'code':60B 'data':63B 'denial':52B 'describ':59B 'execut':61B 'free':36B 'hyper':25B,41B 'hyper-v':24B,40B 'infrastructur':27B 'let':43B 'network':49B 'server':31B 'servic':54B 'sourc':56B 'unauthor':45B 'use':34B 'use-after-fre':33B 'v':26B,42B 'window':28B,30B,39B 'windows-serv':29B","search_c":"'allow':73C 'attack':76C 'deni':78C 'free':67C 'hyper':71C 'hyper-v':70C 'network':82C 'servic':79C 'unauthor':75C 'use':65C 'v':72C 'window':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:44+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-95913","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95913","severity":null,"published_at":"2026-11-10T19:21:44+00:00","modified_at":"2026-11-10T19:21:45+00:00","first_seen_at":"2026-11-10T19:25:23+00:00","fetched_at":"2026-11-10T19:25:23+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}