{"id":"CVE-2026-55321","kind":"vulnerability","aliases":["CVE-2026-55321"],"related":[],"title":"Android KeyMint: heap overflow in ASN.1 parsing lets local apps escalate privileges","description":"In parse_prime256v1 of keymint_asn1.c, there is a possible Heap Buffer Overflow due to a logic error in the code. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation.","summary":"A logic error in the parse_prime256v1 function of Android's keymint_asn1.c allows a heap buffer overflow. The sources say it could lead to local privilege escalation, with user interaction needed for exploitation.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","infrastructure","keymint"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T20:19:13+00:00","first_seen_at":"2026-11-10T20:46:05+00:00","triaged_at":"2026-11-10T20:54:09+00:00","updated_at":"2026-11-10T20:54:09+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T20:54:09Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Android KeyMint: heap overflow in ASN.1 parsing lets local apps escalate privileges","impact":"high","summary":"A logic error in the parse_prime256v1 function of Android's keymint_asn1.c allows a heap buffer overflow. The sources say it could lead to local privilege escalation, with user interaction needed for exploitation.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["android","keymint"],"confidence":0.5,"fix_status":"unknown","needs_auth":"unknown","worst_case":"local code gains elevated privileges on the device","analyst_note":"Find the Android security bulletin entry for CVE-2026-55321 to confirm affected Android versions, the patched patch level and whether a fix is shipped.","how_to_check":"- unknown","plain_action":"unknown","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000649,"input_tokens":4534,"output_tokens":391,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-55321':15A,18A 'allow':35B 'android':1A,19B,31B 'app':10A 'asn.1':6A 'asn1.c':34B,61C 'buffer':38B,67C 'code':76C 'could':44B,78C 'cve':13A,16A 'due':69C 'error':24B,73C 'escal':11A,49B,82C 'execut':86C 'exploit':55B,93C 'function':29B 'heap':3A,37B,66C 'infrastructur':20B 'interact':52B,90C 'keymint':2A,21B,33B,60C 'lead':45B,79C 'let':8A 'local':9A,47B,81C 'logic':23B,72C 'need':53B,88C 'overflow':4A,39B,68C 'pars':7A,27B,57C 'possibl':65C 'prime256v1':28B,58C 'privileg':12A,48B,84C,87C 'say':42B 'sourc':41B 'user':51B,89C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["android","infrastructure","keymint","unknown"],"campaign_type":null,"search_a":"'-2026':14A,17A '-55321':15A,18A 'android':1A 'app':10A 'asn.1':6A 'cve':13A,16A 'escal':11A 'heap':3A 'keymint':2A 'let':8A 'local':9A 'overflow':4A 'pars':7A 'privileg':12A","search_b":"'allow':35B 'android':19B,31B 'asn1.c':34B 'buffer':38B 'could':44B 'error':24B 'escal':49B 'exploit':55B 'function':29B 'heap':37B 'infrastructur':20B 'interact':52B 'keymint':21B,33B 'lead':45B 'local':47B 'logic':23B 'need':53B 'overflow':39B 'pars':27B 'prime256v1':28B 'privileg':48B 'say':42B 'sourc':41B 'user':51B","search_c":"'asn1.c':61C 'buffer':67C 'code':76C 'could':78C 'due':69C 'error':73C 'escal':82C 'execut':86C 'exploit':93C 'heap':66C 'interact':90C 'keymint':60C 'lead':79C 'local':81C 'logic':72C 'need':88C 'overflow':68C 'pars':57C 'possibl':65C 'prime256v1':58C 'privileg':84C,87C 'user':89C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T20:19:13+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-55321","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55321","severity":null,"published_at":"2026-11-10T20:19:13+00:00","modified_at":"2026-11-10T20:19:13+00:00","first_seen_at":"2026-11-10T20:46:05+00:00","fetched_at":"2026-11-10T20:46:05+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"}