{"id":"CVE-2026-113864","kind":"vulnerability","aliases":["CVE-2026-113864"],"related":[],"title":"Windows Hyper-V: use-after-free lets a local user gain higher privileges","description":"Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","summary":"A use-after-free bug in Windows Hyper-V lets an attacker who already has an account on the machine elevate their privileges. The attacker gets the rights of a more powerful local user, which can include full control of the host.","severity":"medium","cvss":6.4,"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":["hyper-v-not-enabled"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:19:07+00:00","first_seen_at":"2026-11-10T19:24:43+00:00","triaged_at":"2026-11-10T19:58:22+00:00","updated_at":"2026-11-10T19:58:22+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:58:22Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Hyper-V: use-after-free lets a local user gain higher privileges","impact":"high","summary":"A use-after-free bug in Windows Hyper-V lets an attacker who already has an account on the machine elevate their privileges. The attacker gets the rights of a more powerful local user, which can include full control of the host.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","hyper-v","windows-server"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains administrator or SYSTEM rights on the host","analyst_note":"Find affected Windows builds and the Microsoft patch from the NVD entry or the Microsoft Security Update Guide for CVE-2026-113864.","how_to_check":"- unknown","plain_action":"","product_name":"Windows Hyper-V","needs_analyst":true,"not_affected_if":["hyper-v-not-enabled"],"who_is_affected":"Only machines running the Windows Hyper-V role are exposed, and the attacker needs a local account on that machine. Hosts without Hyper-V can skip it. The sources do not give affected Windows builds or patch details.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000688,"input_tokens":4481,"output_tokens":480,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-113864':18A,21A '-2026':17A,20A 'account':52B 'allow':86C 'alreadi':49B 'attack':47B,60B,89C 'author':88C 'bug':39B 'control':74B 'cve':16A,19A 'elev':56B,91C 'free':8A,38B,80C 'full':73B 'gain':13A 'get':61B 'higher':14A 'host':77B 'hyper':3A,24A,27B,43B,84C 'hyper-v':2A,23A,26B,42B,83C 'includ':72B 'infrastructur':29B 'let':9A,45B 'local':11A,68B,93C 'machin':55B 'power':67B 'privileg':15A,58B,92C 'right':63B 'server':33B 'use':6A,36B,78C 'use-after-fre':5A,35B 'user':12A,69B 'v':4A,25A,28B,44B,85C 'window':1A,30B,32B,41B,82C 'windows':22A 'windows-serv':31B","nicknames":[],"mitigations":[],"who_affected":"Only machines running the Windows Hyper-V role are exposed, and the attacker needs a local account on that machine. Hosts without Hyper-V can skip it. The sources do not give affected Windows builds or patch details.","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":"'-113864':18A,21A '-2026':17A,20A 'cve':16A,19A 'free':8A 'gain':13A 'higher':14A 'hyper':3A,24A 'hyper-v':2A,23A 'let':9A 'local':11A 'privileg':15A 'use':6A 'use-after-fre':5A 'user':12A 'v':4A,25A 'window':1A 'windows':22A","search_b":"'account':52B 'alreadi':49B 'attack':47B,60B 'bug':39B 'control':74B 'elev':56B 'free':38B 'full':73B 'get':61B 'host':77B 'hyper':27B,43B 'hyper-v':26B,42B 'includ':72B 'infrastructur':29B 'let':45B 'local':68B 'machin':55B 'power':67B 'privileg':58B 'right':63B 'server':33B 'use':36B 'use-after-fre':35B 'user':69B 'v':28B,44B 'window':30B,32B,41B 'windows-serv':31B","search_c":"'allow':86C 'attack':89C 'author':88C 'elev':91C 'free':80C 'hyper':84C 'hyper-v':83C 'local':93C 'privileg':92C 'use':78C 'v':85C 'window':82C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:07+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113864","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113864","severity":null,"published_at":"2026-11-10T19:19:07+00:00","modified_at":"2026-11-10T19:19:07+00:00","first_seen_at":"2026-11-10T19:24:43+00:00","fetched_at":"2026-11-10T19:24:43+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"}