{"id":"CVE-2026-55709","kind":"vulnerability","aliases":["CVE-2026-55709"],"related":[],"title":"Intel TDX MigTD GetQuote: infinite loop lets a hypervisor deny service","description":"Loop with unreachable exit condition ('infinite loop') in the MigTD's GetQuote for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow a denial of service. System software adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.","summary":"Intel's TDX Migration Trust Domain (MigTD) has a loop in its GetQuote code with no reachable exit condition, so it can hang. A system software adversary running at Ring 0 can cause a denial of service by stalling the component.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["confidential-computing","hypervisor","infrastructure","intel-tdx","migtd"],"not_affected_if":["no-intel-tdx","no-migtd"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T18:17:40+00:00","first_seen_at":"2026-11-10T18:22:58+00:00","triaged_at":"2026-11-10T18:24:35+00:00","updated_at":"2026-11-10T18:24:35+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T18:24:35Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Intel TDX MigTD GetQuote: infinite loop lets a hypervisor deny service","impact":"low","summary":"Intel's TDX Migration Trust Domain (MigTD) has a loop in its GetQuote code with no reachable exit condition, so it can hang. A system software adversary running at Ring 0 can cause a denial of service by stalling the component.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["intel-tdx","migtd","confidential-computing","hypervisor"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Denial of service of the MigTD component on the host","analyst_note":"Check Intel's security advisory for affected MigTD versions and the fixed release, linked from https://nvd.nist.gov/vuln/detail/CVE-2026-55709.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-intel-tdx","no-migtd"],"who_is_affected":"Affects hosts running Intel TDX with the MigTD migration component, where a hypervisor or system software adversary can trigger the hang. The sources do not say which MigTD versions are affected or whether a default deployment is exposed. Teams not running Intel TDX migration trust domains can skip it.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000725,"input_tokens":4689,"output_tokens":512,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-55709':14A,17A '0':57B,91C 'access':124C 'adversari':53B,101C 'allow':94C 'attack':111C,126C 'avail':151C,166C 'caus':59B 'code':40B 'combin':106C 'complex':110C 'compon':67B 'comput':20B 'condit':45B,72C 'confidenti':19B,146C,161C 'confidential-comput':18B 'cve':12A,15A 'deni':10A 'denial':61B,96C,114C 'domain':32B,87C 'enabl':113C 'exit':44B,71C 'getquot':4A,39B,79C 'hang':49B 'high':152C 'hypervisor':9A,21B,92C 'impact':144C,168C 'infinit':5A,73C 'infrastructur':22B 'integr':148C,163C 'intel':1A,24B,27B,82C 'intel-tdx':23B 'interact':139C 'intern':133C 'knowledg':134C 'let':7A 'local':123C 'loop':6A,36B,68C,74C 'low':109C 'may':93C,112C,119C,143C 'migrat':30B,85C 'migtd':3A,26B,33B,77C,88C 'none':147C,149C,162C,164C,167C 'occur':121C 'potenti':120C,141C 'present':130C 'r':83C 'reachabl':43B 'requir':127C,136C 'result':118C,157C 'ring':56B,90C 'run':54B 'servic':11A,63B,98C,116C 'softwar':52B,100C 'special':132C 'stall':65B 'subsequ':159C 'system':51B,99C,156C,160C 'tdx':2A,25B,29B,84C 'trust':31B,86C 'unauthent':104C 'unreach':70C 'user':105C,138C 'via':122C 'vulner':142C,155C 'within':89C 'without':131C","nicknames":[],"mitigations":[],"who_affected":"Affects hosts running Intel TDX with the MigTD migration component, where a hypervisor or system software adversary can trigger the hang. The sources do not say which MigTD versions are affected or whether a default deployment is exposed. Teams not running Intel TDX migration trust domains can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["confidentialcomputing","hypervisor","infrastructure","inteltdx","medium","migtd"],"campaign_type":null,"search_a":"'-2026':13A,16A '-55709':14A,17A 'cve':12A,15A 'deni':10A 'getquot':4A 'hypervisor':9A 'infinit':5A 'intel':1A 'let':7A 'loop':6A 'migtd':3A 'servic':11A 'tdx':2A","search_b":"'0':57B 'adversari':53B 'caus':59B 'code':40B 'compon':67B 'comput':20B 'condit':45B 'confidenti':19B 'confidential-comput':18B 'denial':61B 'domain':32B 'exit':44B 'getquot':39B 'hang':49B 'hypervisor':21B 'infrastructur':22B 'intel':24B,27B 'intel-tdx':23B 'loop':36B 'migrat':30B 'migtd':26B,33B 'reachabl':43B 'ring':56B 'run':54B 'servic':63B 'softwar':52B 'stall':65B 'system':51B 'tdx':25B,29B 'trust':31B","search_c":"'0':91C 'access':124C 'adversari':101C 'allow':94C 'attack':111C,126C 'avail':151C,166C 'combin':106C 'complex':110C 'condit':72C 'confidenti':146C,161C 'denial':96C,114C 'domain':87C 'enabl':113C 'exit':71C 'getquot':79C 'high':152C 'hypervisor':92C 'impact':144C,168C 'infinit':73C 'integr':148C,163C 'intel':82C 'interact':139C 'intern':133C 'knowledg':134C 'local':123C 'loop':68C,74C 'low':109C 'may':93C,112C,119C,143C 'migrat':85C 'migtd':77C,88C 'none':147C,149C,162C,164C,167C 'occur':121C 'potenti':120C,141C 'present':130C 'r':83C 'requir':127C,136C 'result':118C,157C 'ring':90C 'servic':98C,116C 'softwar':100C 'special':132C 'subsequ':159C 'system':99C,156C,160C 'tdx':84C 'trust':86C 'unauthent':104C 'unreach':70C 'user':105C,138C 'via':122C 'vulner':142C,155C 'within':89C 'without':131C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T18:17:40+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"secure@intel.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-55709","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55709","severity":null,"published_at":"2026-11-10T18:17:40+00:00","modified_at":"2026-11-10T18:17:40+00:00","first_seen_at":"2026-11-10T18:22:58+00:00","fetched_at":"2026-11-10T18:22:58+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"}