{"id":"CVE-2026-84004","kind":"vulnerability","aliases":["CVE-2026-84004"],"related":[],"title":"AMD Zen processors: optimization can expose data to a local attacker","description":"Processor optimization removal or modification of security-critical code in AMD Zen allows an authorized attacker to disclose information locally.","summary":"AMD Zen processor optimizations can remove or modify security-critical code, so an authorized local user can disclose information. The sources give no further detail on the exact mechanism or affected models.","severity":"medium","cvss":5.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["amd","infrastructure","linux","servers","windows","zen"],"not_affected_if":["intel-only-hardware","no-local-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:21:24+00:00","first_seen_at":"2026-11-10T19:25:18+00:00","triaged_at":"2026-11-10T20:00:34+00:00","updated_at":"2026-11-10T20:00:34+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T20:00:34Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"AMD Zen processors: optimization can expose data to a local attacker","impact":"low","summary":"AMD Zen processor optimizations can remove or modify security-critical code, so an authorized local user can disclose information. The sources give no further detail on the exact mechanism or affected models.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["amd","zen","linux","windows","servers"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user reads information from security-critical processor code","analyst_note":"Find AMD's own advisory for CVE-2026-84004 to list affected Zen models, firmware or microcode versions and any fixed versions.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["intel-only-hardware","no-local-users"],"who_is_affected":"Systems running AMD Zen-based processors where untrusted or low-privileged local users have an account. The sources do not list affected models or firmware versions, so exposure cannot be confirmed from them.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000662,"input_tokens":4492,"output_tokens":425,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-84004':14A,17A 'affect':55B 'allow':70C 'amd':1A,18B,24B,68C 'attack':11A,73C 'author':38B,72C 'code':35B,66C 'critic':34B,65C 'cve':12A,15A 'data':7A 'detail':49B 'disclos':42B,75C 'exact':52B 'expos':6A 'give':46B 'inform':43B,76C 'infrastructur':19B 'linux':20B 'local':10A,39B,77C 'mechan':53B 'model':56B 'modif':61C 'modifi':31B 'optim':4A,27B,58C 'processor':3A,26B,57C 'remov':29B,59C 'secur':33B,64C 'security-crit':32B,63C 'server':21B 'sourc':45B 'user':40B 'window':22B 'zen':2A,23B,25B,69C","nicknames":[],"mitigations":[],"who_affected":"Systems running AMD Zen-based processors where untrusted or low-privileged local users have an account. The sources do not list affected models or firmware versions, so exposure cannot be confirmed from them.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["amd","infrastructure","linux","medium","servers","windows","zen"],"campaign_type":null,"search_a":"'-2026':13A,16A '-84004':14A,17A 'amd':1A 'attack':11A 'cve':12A,15A 'data':7A 'expos':6A 'local':10A 'optim':4A 'processor':3A 'zen':2A","search_b":"'affect':55B 'amd':18B,24B 'author':38B 'code':35B 'critic':34B 'detail':49B 'disclos':42B 'exact':52B 'give':46B 'inform':43B 'infrastructur':19B 'linux':20B 'local':39B 'mechan':53B 'model':56B 'modifi':31B 'optim':27B 'processor':26B 'remov':29B 'secur':33B 'security-crit':32B 'server':21B 'sourc':45B 'user':40B 'window':22B 'zen':23B,25B","search_c":"'allow':70C 'amd':68C 'attack':73C 'author':72C 'code':66C 'critic':65C 'disclos':75C 'inform':76C 'local':77C 'modif':61C 'optim':58C 'processor':57C 'remov':59C 'secur':64C 'security-crit':63C 'zen':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:24+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-84004","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84004","severity":null,"published_at":"2026-11-10T19:21:24+00:00","modified_at":"2026-11-10T19:21:24+00:00","first_seen_at":"2026-11-10T19:25:18+00:00","fetched_at":"2026-11-10T19:25:18+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"}