{"id":"CVE-2026-0454","kind":"vulnerability","aliases":["CVE-2026-0454"],"related":[],"title":"AMD SEV firmware: out-of-bounds write lets a hypervisor corrupt firmware variables","description":"An out-of-bounds write in the AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to corrupt global firmware variables, potentially resulting in loss of integrity.","summary":"An out-of-bounds write in AMD Secure Encrypted Virtualization firmware lets a malicious hypervisor corrupt global firmware variables. The sources describe the result as loss of integrity.","severity":"medium","cvss":4.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["amd","hypervisor","infrastructure","sev","virtualization"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T23:17:19+00:00","first_seen_at":"2026-11-10T23:27:36+00:00","triaged_at":"2026-11-10T23:28:52+00:00","updated_at":"2026-11-10T23:28:52+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T23:28:52Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"AMD SEV firmware: out-of-bounds write lets a hypervisor corrupt firmware variables","impact":"medium","summary":"An out-of-bounds write in AMD Secure Encrypted Virtualization firmware lets a malicious hypervisor corrupt global firmware variables. The sources describe the result as loss of integrity.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["amd","sev","hypervisor","virtualization"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Malicious hypervisor corrupts global firmware variables, losing integrity guarantees","analyst_note":"Find AMD's security bulletin for CVE-2026-0454 to get affected SEV firmware versions and the fixed firmware version.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Affects hosts running AMD SEV-capable processors where the hypervisor is the attacker. The sources do not name affected products, versions or configurations. unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000672,"input_tokens":4537,"output_tokens":437,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-0454':17A,20A '-2026':16A,19A 'allow':70C 'amd':1A,21B,33B,63C 'bound':7A,30B,59C 'corrupt':12A,42B,75C 'could':69C 'cve':15A,18A 'describ':48B 'encrypt':35B,65C 'firmwar':3A,13A,37B,44B,68C,77C 'global':43B,76C 'hypervisor':11A,22B,41B,73C 'infrastructur':23B 'integr':54B,84C 'let':9A,38B 'loss':52B,82C 'malici':40B,72C 'out-of-bound':4A,27B,56C 'potenti':79C 'result':50B,80C 'secur':34B,64C 'sev':2A,24B,67C 'sourc':47B 'variabl':14A,45B,78C 'virtual':25B,36B,66C 'write':8A,31B,60C","nicknames":[],"mitigations":[],"who_affected":"Affects hosts running AMD SEV-capable processors where the hypervisor is the attacker. The sources do not name affected products, versions or configurations. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["amd","hypervisor","infrastructure","medium","sev","virtualization"],"campaign_type":null,"search_a":"'-0454':17A,20A '-2026':16A,19A 'amd':1A 'bound':7A 'corrupt':12A 'cve':15A,18A 'firmwar':3A,13A 'hypervisor':11A 'let':9A 'out-of-bound':4A 'sev':2A 'variabl':14A 'write':8A","search_b":"'amd':21B,33B 'bound':30B 'corrupt':42B 'describ':48B 'encrypt':35B 'firmwar':37B,44B 'global':43B 'hypervisor':22B,41B 'infrastructur':23B 'integr':54B 'let':38B 'loss':52B 'malici':40B 'out-of-bound':27B 'result':50B 'secur':34B 'sev':24B 'sourc':47B 'variabl':45B 'virtual':25B,36B 'write':31B","search_c":"'allow':70C 'amd':63C 'bound':59C 'corrupt':75C 'could':69C 'encrypt':65C 'firmwar':68C,77C 'global':76C 'hypervisor':73C 'integr':84C 'loss':82C 'malici':72C 'out-of-bound':56C 'potenti':79C 'result':80C 'secur':64C 'sev':67C 'variabl':78C 'virtual':66C 'write':60C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T23:17:19+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/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":"psirt@amd.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-0454","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0454","severity":null,"published_at":"2026-11-10T23:17:19+00:00","modified_at":"2026-11-10T23:17:19+00:00","first_seen_at":"2026-11-10T23:27:36+00:00","fetched_at":"2026-11-10T23:27:36+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"}