{"id":"CVE-2026-58781","kind":"vulnerability","aliases":["CVE-2026-58781"],"related":[],"title":"Android HostLinkBase: out-of-bounds write lets a local app gain system privileges","description":"In HostLinkBase::chreIpiHandler of host_link.cc, there is a possible out-of-bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.","summary":"A missing bounds check in HostLinkBase::chreIpiHandler in host_link.cc allows an out-of-bounds write. A local attacker with existing execution privileges could escalate to System-level privileges without user interaction.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","infrastructure","local-privilege-escalation"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T20:19:25+00:00","first_seen_at":"2026-11-10T20:46:10+00:00","triaged_at":"2026-11-10T20:51:48+00:00","updated_at":"2026-11-10T20:51:48+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T20:51:48Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Android HostLinkBase: out-of-bounds write lets a local app gain system privileges","impact":"high","summary":"A missing bounds check in HostLinkBase::chreIpiHandler in host_link.cc allows an out-of-bounds write. A local attacker with existing execution privileges could escalate to System-level privileges without user interaction.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["android","local-privilege-escalation"],"confidence":0.4,"fix_status":"unknown","needs_auth":"yes","worst_case":"local code gains System-level privileges on the device","analyst_note":"Identify the affected product and Android security bulletin entry for CVE-2026-58781 and the fixed patch level from the NVD page or vendor bulletin.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources do not name the affected product versions or devices. The flaw is in code that handles inter-processor messages on the host link, so it is likely limited to devices running the affected firmware, and it needs local code execution first. unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000673,"input_tokens":4540,"output_tokens":438,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-58781':17A,20A 'allow':36B 'android':1A,21B 'app':11A 'attack':45B 'bound':6A,29B,41B,72C,78C 'check':30B,79C 'chreipihandl':33B,62C 'could':50B,81C 'cve':15A,18A 'due':74C 'escal':26B,51B,85C 'execut':48B,90C 'exist':47B 'exploit':99C 'gain':12A 'host_link.cc':35B,64C 'hostlinkbas':2A,32B,61C 'infrastructur':22B 'interact':59B,94C 'lead':82C 'let':8A 'level':55B 'local':10A,24B,44B,84C 'local-privilege-escal':23B 'miss':28B,77C 'need':92C,97C 'out-of-bound':3A,38B,69C 'possibl':68C 'privileg':14A,25B,49B,56B,87C,91C 'system':13A,54B,89C 'system-level':53B 'user':58B,93C 'without':57B 'write':7A,42B,73C","nicknames":[],"mitigations":[],"who_affected":"The sources do not name the affected product versions or devices. The flaw is in code that handles inter-processor messages on the host link, so it is likely limited to devices running the affected firmware, and it needs local code execution first. unknown","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["android","infrastructure","localprivilegeescalation","unknown"],"campaign_type":null,"search_a":"'-2026':16A,19A '-58781':17A,20A 'android':1A 'app':11A 'bound':6A 'cve':15A,18A 'gain':12A 'hostlinkbas':2A 'let':8A 'local':10A 'out-of-bound':3A 'privileg':14A 'system':13A 'write':7A","search_b":"'allow':36B 'android':21B 'attack':45B 'bound':29B,41B 'check':30B 'chreipihandl':33B 'could':50B 'escal':26B,51B 'execut':48B 'exist':47B 'host_link.cc':35B 'hostlinkbas':32B 'infrastructur':22B 'interact':59B 'level':55B 'local':24B,44B 'local-privilege-escal':23B 'miss':28B 'out-of-bound':38B 'privileg':25B,49B,56B 'system':54B 'system-level':53B 'user':58B 'without':57B 'write':42B","search_c":"'bound':72C,78C 'check':79C 'chreipihandl':62C 'could':81C 'due':74C 'escal':85C 'execut':90C 'exploit':99C 'host_link.cc':64C 'hostlinkbas':61C 'interact':94C 'lead':82C 'local':84C 'miss':77C 'need':92C,97C 'out-of-bound':69C 'possibl':68C 'privileg':87C,91C 'system':89C 'user':93C 'write':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T20:19:25+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-58781","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58781","severity":null,"published_at":"2026-11-10T20:19:25+00:00","modified_at":"2026-11-10T20:19:25+00:00","first_seen_at":"2026-11-10T20:46:10+00:00","fetched_at":"2026-11-10T20:46:10+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"}