{"id":"CVE-2025-62620","kind":"vulnerability","aliases":["CVE-2025-62620"],"related":[],"title":"Xen-style hypervisor ring buffer flaw lets privileged attacker corrupt guest memory","description":"Improper validation of unsafe equivalence in input could allow an attacker with high privileges to reclaim the ring buffer queue status page, potentially resulting in loss of guest memory integrity.","summary":"An attacker holding high privileges can get a ring buffer queue status page reclaimed, which can break the integrity of guest memory. The description does not name the affected product or versions.","severity":"medium","cvss":5.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["hypervisor","infrastructure","virtualization"],"not_affected_if":["no-virtualization"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T22:17:46+00:00","first_seen_at":"2026-11-10T22:27:23+00:00","triaged_at":"2026-11-10T22:30:33+00:00","updated_at":"2026-11-10T22:30:33+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T22:30:33Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Xen-style hypervisor ring buffer flaw lets privileged attacker corrupt guest memory","impact":"medium","summary":"An attacker holding high privileges can get a ring buffer queue status page reclaimed, which can break the integrity of guest memory. The description does not name the affected product or versions.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["hypervisor","virtualization"],"confidence":0.4,"fix_status":"unknown","needs_auth":"yes","worst_case":"guest memory integrity lost on virtualized host","analyst_note":"Identify the affected product and versions from the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2025-62620) and the vendor advisory; the description alone names no product.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-virtualization"],"who_is_affected":"unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000642,"input_tokens":4515,"output_tokens":381,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2025':15A,18A '-62620':16A,19A 'affect':51B 'allow':63C 'attack':10A,24B,65C 'break':39B 'buffer':6A,32B,73C 'corrupt':11A 'could':62C 'cve':14A,17A 'descript':46B 'equival':59C 'flaw':7A 'get':29B 'guest':12A,43B,82C 'high':26B,67C 'hold':25B 'hypervisor':4A,20B 'improp':55C 'infrastructur':21B 'input':61C 'integr':41B,84C 'let':8A 'loss':80C 'memori':13A,44B,83C 'name':49B 'page':35B,76C 'potenti':77C 'privileg':9A,27B,68C 'product':52B 'queue':33B,74C 'reclaim':36B,70C 'result':78C 'ring':5A,31B,72C 'status':34B,75C 'style':3A 'unsaf':58C 'valid':56C 'version':54B 'virtual':22B 'xen':2A 'xen-styl':1A","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["hypervisor","infrastructure","medium","virtualization"],"campaign_type":null,"search_a":"'-2025':15A,18A '-62620':16A,19A 'attack':10A 'buffer':6A 'corrupt':11A 'cve':14A,17A 'flaw':7A 'guest':12A 'hypervisor':4A 'let':8A 'memori':13A 'privileg':9A 'ring':5A 'style':3A 'xen':2A 'xen-styl':1A","search_b":"'affect':51B 'attack':24B 'break':39B 'buffer':32B 'descript':46B 'get':29B 'guest':43B 'high':26B 'hold':25B 'hypervisor':20B 'infrastructur':21B 'integr':41B 'memori':44B 'name':49B 'page':35B 'privileg':27B 'product':52B 'queue':33B 'reclaim':36B 'ring':31B 'status':34B 'version':54B 'virtual':22B","search_c":"'allow':63C 'attack':65C 'buffer':73C 'could':62C 'equival':59C 'guest':82C 'high':67C 'improp':55C 'input':61C 'integr':84C 'loss':80C 'memori':83C 'page':76C 'potenti':77C 'privileg':68C 'queue':74C 'reclaim':70C 'result':78C 'ring':72C 'status':75C 'unsaf':58C 'valid':56C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T22:17:46+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/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-2025-62620","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62620","severity":null,"published_at":"2026-11-10T22:17:46+00:00","modified_at":"2026-11-10T22:17:46+00:00","first_seen_at":"2026-11-10T22:27:23+00:00","fetched_at":"2026-11-10T22:27:23+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"}