{"id":"CVE-2021-30900","kind":"vulnerability","aliases":["CVE-2021-30900"],"related":[],"title":"An out-of-bounds write issue was addressed with improved bounds checking","description":"Apple GPU drivers, included in iOS, iPadOS, and macOS, contain an out-of-bounds write vulnerability that may allow a malicious application to execute code with kernel privileges.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Apple GPU drivers in iOS, iPadOS and macOS have an out-of-bounds write bug. A malicious app can use it to run code with kernel privileges.","severity":"critical","cvss":9.3,"epss":null,"exploited":true,"exploited_at":"2023-03-30T00:00:00+00:00","products":[{"name":"Apple iOS, iPadOS, and macOS","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"apple ipados","fixed":["14.8.1"],"affected":"< 14.8.1","ecosystem":"vendor"},{"name":"apple ipados","fixed":[],"affected":"= 15.0","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["14.8.1"],"affected":"< 14.8.1","ecosystem":"vendor"},{"name":"apple iphone os","fixed":[],"affected":"= 15.0","ecosystem":"vendor"},{"name":"apple macos","fixed":["11.6.1"],"affected":"< 11.6.1","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apple-devices","exploited","infrastructure","ios","ipados","macos"],"not_affected_if":["unpatched-devices-only"],"how_to_check":null,"fix":"Apply the Apple updates for iOS, iPadOS and macOS per vendor instructions; the sources do not name the fixed versions.","status":"open","published_at":"2021-08-24T19:15:18+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:08:28+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:08:28Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Apple updates for iOS, iPadOS and macOS per vendor instructions; the sources do not name the fixed versions.","reach":"local","impact":"high","summary":"Apple GPU drivers in iOS, iPadOS and macOS have an out-of-bounds write bug. A malicious app can use it to run code with kernel privileges.","category":"infrastructure","who_cares":["ios","ipados","macos","apple-devices"],"confidence":0.6,"needs_auth":"no","worst_case":"Malicious app gains kernel privileges, full device takeover.","analyst_note":"Sources are CISA KEV only; find Apple's security content page for CVE-2021-30900 to get fixed versions and affected builds.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unpatched-devices-only"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000448,"input_tokens":2832,"output_tokens":329,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2021':15A,18A '-30900':16A,19A 'action':104C 'address':9A 'allow':92C 'and':23A 'app':63B 'appl':38B,45B,73C 'apple':20A,25A,27A,29A,32A,35A 'apple-devic':37B 'appli':105C 'applic':95C 'bound':5A,12A,58B,87C 'bug':60B 'check':13A 'cisa':102C 'code':69B,98C 'contain':82C 'cve':14A,17A 'devic':39B 'driver':47B,75C 'execut':97C 'exploit':40B 'gpu':46B,74C 'improv':11A 'includ':76C 'infrastructur':41B 'instruct':109C 'io':42B,49B,78C 'ios':21A 'ipado':43B,50B,79C 'ipados':22A,26A,28A 'iphone':30A,33A 'issu':7A 'kernel':71B,100C 'maco':44B,52B,81C 'macos':24A,36A 'malici':62B,94C 'may':91C 'os':31A,34A 'out-of-bound':2A,55B,84C 'per':107C 'privileg':72B,101C 'requir':103C 'run':68B 'updat':106C 'use':65B 'vendor':108C 'vulner':89C 'write':6A,59B,88C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-08-24T19:15:18+00:00","kev":{"dateAdded":"2023-03-30","dueDate":"2023-04-20","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-2021-30900","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30900","severity":null,"published_at":"2023-03-30T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-30900","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-30900","severity":null,"published_at":"2021-08-24T19:15:18+00:00","modified_at":"2026-06-17T03:51:06+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}