{"id":"CVE-2020-0041","kind":"vulnerability","aliases":["CVE-2020-0041"],"related":[],"title":"Android Android Kernel: Android Kernel Out-of-Bounds Write Vulnerability","description":"Android Kernel binder_transaction of binder.c contains an out-of-bounds write vulnerability due to an incorrect bounds check that could allow for local privilege escalation. This vulnerability was observed chained with CVE-2019-2215 and CVE-2020-0069 under exploit chain \"AbstractEmu.\"\n\nCISA required action: Apply updates per vendor instructions.","summary":"An out-of-bounds write in the Android kernel's binder_transaction function, caused by a bad bounds check, lets a local app escalate its privileges. It was seen exploited in the wild as part of a chain with CVE-2019-2215 and CVE-2020-0069.","severity":"high","cvss":7.8,"epss":0.03145,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Android Android Kernel","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["android","exploited","infrastructure","kernel","mobile-devices"],"not_affected_if":["patched-device"],"how_to_check":"Check the Android security patch level on the device (Settings > About phone) against the vendor bulletin; unknown for a fleet-wide command.","fix":"Install the Android security update that includes the fix for CVE-2020-0041, per vendor instructions.","status":"open","published_at":"2020-03-10T20:15:21+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:32:09+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:32:09Z","model":"claude-haiku-5-5","output":{"fix":"Install the Android security update that includes the fix for CVE-2020-0041, per vendor instructions.\nunknown for the exact patch level.","reach":"local","impact":"high","summary":"An out-of-bounds write in the Android kernel's binder_transaction function, caused by a bad bounds check, lets a local app escalate its privileges. It was seen exploited in the wild as part of a chain with CVE-2019-2215 and CVE-2020-0069.","category":"infrastructure","who_cares":["android","mobile-devices","kernel"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker gains kernel-level privileges on the local Android device.","analyst_note":"Confirm the fixed Android patch level and affected versions from the Android security bulletin, since the sources give no version data.","how_to_check":"Check the Android security patch level on the device (Settings > About phone) against the vendor bulletin; unknown for a fleet-wide command.","needs_analyst":true,"not_affected_if":["patched-device"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000483,"input_tokens":2884,"output_tokens":390,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0041':14A,17A '-0069':74B,114C '-2019':69B,109C '-2020':13A,16A,73B,113C '-2215':70B,110C 'abstractemu':118C 'action':121C 'allow':97C 'android':1A,2A,4A,18A,19A,21B,36B,75C 'app':51B 'appli':122C 'bad':45B 'binder':39B,77C 'binder.c':80C 'bound':9A,32B,46B,86C,93C 'caus':42B 'chain':66B,106C,117C 'check':47B,94C 'cisa':119C 'contain':81C 'could':96C 'cve':12A,15A,68B,72B,108C,112C 'devic':27B 'due':89C 'escal':52B,101C 'exploit':22B,58B,116C 'function':41B 'incorrect':92C 'infrastructur':23B 'instruct':126C 'kernel':3A,5A,20A,24B,37B,76C 'let':48B 'local':50B,99C 'mobil':26B 'mobile-devic':25B 'observ':105C 'out-of-bound':6A,29B,83C 'part':63B 'per':124C 'privileg':54B,100C 'requir':120C 'seen':57B 'transact':40B,78C 'updat':123C 'vendor':125C 'vulner':11A,88C,103C 'wild':61B 'write':10A,33B,87C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-03-10T20:15:21+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-0041","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-0041","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T20:35:38+00:00","note":null},{"source":"epss","external_id":"CVE-2020-0041","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-0041","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-0041","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-0041","severity":null,"published_at":"2020-03-10T20:15:21+00:00","modified_at":"2026-06-17T02:45:07+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}