{"id":"CVE-2026-105566","kind":"vulnerability","aliases":["CVE-2026-105566"],"related":[],"title":"Windows Kernel: race condition lets a local user gain higher privileges","description":"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.","summary":"A race condition in the Windows kernel lets an attacker who already has local access on a machine raise their privileges. The attacker needs an authorized account on the system to use it.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:17:59+00:00","first_seen_at":"2026-11-10T19:24:20+00:00","triaged_at":"2026-11-10T19:54:00+00:00","updated_at":"2026-11-10T19:54:00+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T19:54:00Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Kernel: race condition lets a local user gain higher privileges","impact":"high","summary":"A race condition in the Windows kernel lets an attacker who already has local access on a machine raise their privileges. The attacker needs an authorized account on the system to use it.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains kernel-level SYSTEM privileges on the machine","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-105566 to get affected Windows builds and the fixed KB or patch.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Any Windows machine where an authorized user can log on locally may be exposed; the sources do not name affected Windows builds. Systems with no untrusted local users are lower risk. unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000647,"input_tokens":4503,"output_tokens":394,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-105566 to get affected Windows builds and the fixed KB or patch.","search":"'-105566':14A,17A '-2026':13A,16A 'access':34B 'account':46B 'allow':65C 'alreadi':31B 'attack':29B,42B,68C 'author':45B,67C 'concurr':52C 'condit':4A,22B,61C 'cve':12A,15A 'elev':70C 'execut':53C 'gain':9A 'higher':10A 'improp':58C 'infrastructur':18B 'kernel':2A,26B,64C 'let':5A,27B 'local':7A,33B,72C 'machin':37B 'need':43B 'privileg':11A,40B,71C 'race':3A,21B,60C 'rais':38B 'resourc':56C 'share':55C 'synchron':59C 'system':49B 'use':51B,54C 'user':8A 'window':1A,19B,25B,63C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine where an authorized user can log on locally may be exposed; the sources do not name affected Windows builds. Systems with no untrusted local users are lower risk. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","windows"],"campaign_type":null,"search_a":"'-105566':14A,17A '-2026':13A,16A 'condit':4A 'cve':12A,15A 'gain':9A 'higher':10A 'kernel':2A 'let':5A 'local':7A 'privileg':11A 'race':3A 'user':8A 'window':1A","search_b":"'access':34B 'account':46B 'alreadi':31B 'attack':29B,42B 'author':45B 'condit':22B 'infrastructur':18B 'kernel':26B 'let':27B 'local':33B 'machin':37B 'need':43B 'privileg':40B 'race':21B 'rais':38B 'system':49B 'use':51B 'window':19B,25B","search_c":"'allow':65C 'attack':68C 'author':67C 'concurr':52C 'condit':61C 'elev':70C 'execut':53C 'improp':58C 'kernel':64C 'local':72C 'privileg':71C 'race':60C 'resourc':56C 'share':55C 'synchron':59C 'use':54C 'window':63C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:59+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105566","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105566","severity":null,"published_at":"2026-11-10T19:17:59+00:00","modified_at":"2026-11-10T19:17:59+00:00","first_seen_at":"2026-11-10T19:24:20+00:00","fetched_at":"2026-11-10T19:24:20+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"}