{"id":"CVE-2026-58956","kind":"vulnerability","aliases":["CVE-2026-58956"],"related":[],"title":"Android verified boot: RSA signature check can be bypassed locally","description":"In modpowF4 of avb_rsa.c, there is a possible signature verification bypass due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.","summary":"A logic error in modpowF4 in avb_rsa.c, the Android Verified Boot RSA code, can let a forged signature pass verification. The sources say this leads to local privilege escalation with no extra execution privileges and no user interaction.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","embedded","infrastructure","verified-boot"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T20:17:52+00:00","first_seen_at":"2026-11-02T20:35:34+00:00","triaged_at":"2026-11-02T20:38:35+00:00","updated_at":"2026-11-02T20:38:35+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-02T20:38:35Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Android verified boot: RSA signature check can be bypassed locally","impact":"high","summary":"A logic error in modpowF4 in avb_rsa.c, the Android Verified Boot RSA code, can let a forged signature pass verification. The sources say this leads to local privilege escalation with no extra execution privileges and no user interaction.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["android","embedded","verified-boot"],"confidence":0.4,"fix_status":"unknown","needs_auth":"unknown","worst_case":"local attacker escalates privileges past boot signature checks","analyst_note":"Identify affected Android or AVB versions and the fixed patch level from the NVD entry and the Android security bulletin; the sources give no product ranges.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources do not name affected Android versions or devices, so it is unknown which builds are exposed. Teams that ship or manage Android-based devices should check their vendor's security bulletin for the fixed build.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000626,"input_tokens":4096,"output_tokens":432,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-58956':13A,16A 'addit':92C 'android':1A,17B,32B 'avb':29B,65C 'boot':3A,22B,34B 'bypass':9A,73C 'check':6A 'code':36B,81C 'could':83C 'cve':11A,14A 'due':74C 'embed':18B 'error':25B,78C 'escal':52B,87C 'execut':56B,93C 'exploit':102C 'extra':55B 'forg':40B 'infrastructur':19B 'interact':61B,97C 'lead':48B,84C 'let':38B 'local':10A,50B,86C 'logic':24B,77C 'modpowf4':27B,63C 'need':95C,100C 'pass':42B 'possibl':70C 'privileg':51B,57B,89C,94C 'rsa':4A,35B 'rsa.c':30B,66C 'say':46B 'signatur':5A,41B,71C 'sourc':45B 'user':60B,96C 'verif':43B,72C 'verifi':2A,21B,33B 'verified-boot':20B","nicknames":[],"mitigations":[],"who_affected":"The sources do not name affected Android versions or devices, so it is unknown which builds are exposed. Teams that ship or manage Android-based devices should check their vendor's security bulletin for the fixed build.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"everyone","plain_action":null,"pkeys":[],"ptokens":[],"labels":["android","embedded","infrastructure","unknown","verifiedboot"],"first_public_at":"2026-11-02T20:17:52+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-58956","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58956","severity":null,"published_at":"2026-11-02T20:17:52+00:00","modified_at":"2026-11-02T20:17:52+00:00","first_seen_at":"2026-11-02T20:35:34+00:00","fetched_at":"2026-11-02T20:35:34+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}