{"id":"CVE-2026-49036","kind":"vulnerability","aliases":["CVE-2026-49036"],"related":[],"title":"Intel TDX MigTD: shared-memory race lets a privileged attacker corrupt data","description":"Time-of-check time-of-use race condition in the MigTD shared memory for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable data corruption. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (high) 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 time-of-check time-of-use race in its shared memory, so a privileged system-software attacker can corrupt data or cause a denial of service. The flaw is reachable only locally and needs no user interaction.","severity":"medium","cvss":5.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["confidential-computing","hypervisor","infrastructure","intel-tdx"],"not_affected_if":["no-tdx-migration"],"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":"2026-11-10T18:25:06+00:00","updated_at":"2026-11-10T18:25:06+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T18:25:06Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Intel TDX MigTD: shared-memory race lets a privileged attacker corrupt data","impact":"medium","summary":"Intel's TDX Migration Trust Domain (MigTD) has a time-of-check time-of-use race in its shared memory, so a privileged system-software attacker can corrupt data or cause a denial of service. The flaw is reachable only locally and needs no user interaction.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["intel-tdx","confidential-computing","hypervisor"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"privileged local attacker corrupts migration trust domain data","analyst_note":"Check Intel's security advisory for affected MigTD versions and the fixed release; NVD entry alone gives no ranges.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-tdx-migration"],"who_is_affected":"Affects hosts running Intel TDX with MigTD for confidential VM live migration; the sources do not name affected versions. Attack requires privileged local access on the host side, so teams without TDX migration deployments can skip it.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000702,"input_tokens":4672,"output_tokens":470,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-49036':16A,19A '0':103C 'access':135C 'adversari':113C 'allow':106C 'attack':11A,56B,123C,137C 'avail':161C,176C 'caus':61B 'check':40B,80C 'combin':118C 'complex':122C 'comput':22B 'condit':86C 'confidenti':21B,156C,171C 'confidential-comput':20B 'corrupt':12A,58B,127C 'cve':14A,17A 'data':13A,59B,126C 'denial':63B,108C 'domain':33B,99C 'enabl':125C 'flaw':67B 'high':159C,162C 'hypervisor':23B,104C 'impact':154C,178C 'infrastructur':24B 'integr':158C,173C 'intel':1A,26B,28B,94C 'intel-tdx':25B 'interact':76B,149C 'intern':143C 'knowledg':144C 'let':8A 'local':71B,134C 'low':121C 'may':105C,124C,130C,153C 'memori':6A,49B,91C 'migrat':31B,97C 'migtd':3A,34B,89C,100C 'need':73B 'none':157C,172C,174C,177C 'occur':132C 'potenti':131C,151C 'present':140C 'privileg':10A,52B,116C 'r':95C 'race':7A,45B,85C 'reachabl':69B 'requir':138C,146C 'result':129C,167C 'ring':102C 'servic':65B,110C 'share':5A,48B,90C 'shared-memori':4A 'softwar':55B,112C 'special':142C 'subsequ':169C 'system':54B,111C,166C,170C 'system-softwar':53B 'tdx':2A,27B,30B,96C 'time':38B,42B,78C,82C 'time-of-check':37B,77C 'time-of-us':41B,81C 'trust':32B,98C 'use':44B,84C 'user':75B,117C,148C 'via':133C 'vulner':152C,165C 'within':101C 'without':141C","nicknames":[],"mitigations":[],"who_affected":"Affects hosts running Intel TDX with MigTD for confidential VM live migration; the sources do not name affected versions. Attack requires privileged local access on the host side, so teams without TDX migration deployments 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"],"campaign_type":null,"search_a":"'-2026':15A,18A '-49036':16A,19A 'attack':11A 'corrupt':12A 'cve':14A,17A 'data':13A 'intel':1A 'let':8A 'memori':6A 'migtd':3A 'privileg':10A 'race':7A 'share':5A 'shared-memori':4A 'tdx':2A","search_b":"'attack':56B 'caus':61B 'check':40B 'comput':22B 'confidenti':21B 'confidential-comput':20B 'corrupt':58B 'data':59B 'denial':63B 'domain':33B 'flaw':67B 'hypervisor':23B 'infrastructur':24B 'intel':26B,28B 'intel-tdx':25B 'interact':76B 'local':71B 'memori':49B 'migrat':31B 'migtd':34B 'need':73B 'privileg':52B 'race':45B 'reachabl':69B 'servic':65B 'share':48B 'softwar':55B 'system':54B 'system-softwar':53B 'tdx':27B,30B 'time':38B,42B 'time-of-check':37B 'time-of-us':41B 'trust':32B 'use':44B 'user':75B","search_c":"'0':103C 'access':135C 'adversari':113C 'allow':106C 'attack':123C,137C 'avail':161C,176C 'check':80C 'combin':118C 'complex':122C 'condit':86C 'confidenti':156C,171C 'corrupt':127C 'data':126C 'denial':108C 'domain':99C 'enabl':125C 'high':159C,162C 'hypervisor':104C 'impact':154C,178C 'integr':158C,173C 'intel':94C 'interact':149C 'intern':143C 'knowledg':144C 'local':134C 'low':121C 'may':105C,124C,130C,153C 'memori':91C 'migrat':97C 'migtd':89C,100C 'none':157C,172C,174C,177C 'occur':132C 'potenti':131C,151C 'present':140C 'privileg':116C 'r':95C 'race':85C 'requir':138C,146C 'result':129C,167C 'ring':102C 'servic':110C 'share':90C 'softwar':112C 'special':142C 'subsequ':169C 'system':111C,166C,170C 'tdx':96C 'time':78C,82C 'time-of-check':77C 'time-of-us':81C 'trust':98C 'use':84C 'user':117C,148C 'via':133C 'vulner':152C,165C 'within':101C 'without':141C","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:P/PR:H/UI:N/VC:N/VI:H/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-2026-49036","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49036","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"}