{"id":"CVE-2016-4656","kind":"vulnerability","aliases":["CVE-2016-4656"],"related":[],"title":"Apple iOS: Apple iOS Memory Corruption Vulnerability","description":"A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Apple iOS kernel has a memory corruption flaw that lets an attacker run code with kernel privileges or crash the device through a crafted app. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.3,"epss":0.23626,"exploited":true,"exploited_at":"2022-05-24T00:00:00+00:00","products":[{"name":"Apple iOS","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","ios","ipad","iphone","vendor"],"not_affected_if":["fully-patched-devices"],"how_to_check":"Settings > General > About shows the iOS version; compare it against the fixed release named by Apple's advisory.","fix":"Update iOS to a version that includes Apple's fix for CVE-2016-4656, as directed by CISA's required action.","status":"open","published_at":"2016-08-25T21:59:01+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:15:47+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:15:47Z","model":"claude-haiku-5-5","output":{"fix":"Update iOS to a version that includes Apple's fix for CVE-2016-4656, as directed by CISA's required action.\nunknown","reach":"local","impact":"high","summary":"Apple iOS kernel has a memory corruption flaw that lets an attacker run code with kernel privileges or crash the device through a crafted app. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["ios","iphone","ipad"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code with kernel privileges or crashes the device","analyst_note":"Find the fixed iOS version and affected range in Apple's security advisory for CVE-2016-4656; sources given do not name them.","how_to_check":"Settings > General > About shows the iOS version; compare it against the fixed release named by Apple's advisory.\nunknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000465,"input_tokens":2829,"output_tokens":364,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2016':9A,12A '-4656':10A,13A 'action':86C 'activ':50B 'allow':63C 'app':45B 'appl':1A,3A,21B,60C 'apple':14A 'appli':87C 'applic':83C 'attack':32B,64C 'caus':73C 'cisa':46B,84C 'code':34B,67C 'context':71C 'corrupt':6A,27B,57C 'craft':44B,82C 'crash':39B 'cve':8A,11A 'denial':76C 'denial-of-servic':75C 'devic':41B 'dos':79C 'execut':66C 'exploit':16B,51B 'flaw':28B 'instruct':91C 'io':2A,4A,17B,22B,61C 'ios':15A 'ipad':18B 'iphon':19B 'kernel':23B,36B,62C 'let':30B 'list':47B 'memori':5A,26B,56C 'per':89C 'privileg':37B,70C 'requir':85C 'run':33B 'servic':78C 'updat':88C 'vendor':20B,90C 'via':80C 'vulner':7A,58C 'wild':54B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2016-08-25T21:59:01+00:00","kev":{"dateAdded":"2022-05-24","dueDate":"2022-06-14","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2016-4656","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2016-4656","severity":null,"published_at":"2022-05-24T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T13:39:31+00:00","note":null},{"source":"epss","external_id":"CVE-2016-4656","url":"https://api.first.org/data/v1/epss?cve=CVE-2016-4656","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2016-4656","url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4656","severity":null,"published_at":"2016-08-25T21:59:01+00:00","modified_at":"2026-06-17T00:47:58+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"}