{"id":"CVE-2026-84494","kind":"vulnerability","aliases":["CVE-2026-84494"],"related":[],"title":"Apple iOS, macOS and visionOS: out-of-bounds kernel write lets an app crash or write kernel memory","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, visionOS 27.2. An app may be able to cause unexpected system termination or write kernel memory.","summary":"An out-of-bounds write flaw in Apple's kernel lets a local app crash the system or write kernel memory. Fixed by Apple's bounds checking in the 27.2 releases.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple-devices","infrastructure","ios","ipados","macos","visionos"],"not_affected_if":["already-on-27.2"],"how_to_check":"- Check the device version under Settings > General > About (or `sw_vers -productVersion` on macOS) and compare it to the fixed versions below.","fix":"- Update iOS and iPadOS to `27.2`\n- Update macOS Golden Gate to `27.2`\n- Update visionOS to `27.2`","status":"open","published_at":"2026-10-26T21:19:59+00:00","first_seen_at":"2026-10-26T21:55:21+00:00","triaged_at":"2026-10-26T21:57:20+00:00","updated_at":"2026-10-26T21:57:20+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-26T21:57:20Z","model":"claude-haiku-5-5","output":{"fix":"- Update iOS and iPadOS to `27.2`\n- Update macOS Golden Gate to `27.2`\n- Update visionOS to `27.2`","reach":"local","title":"Apple iOS, macOS and visionOS: out-of-bounds kernel write lets an app crash or write kernel memory","impact":"high","summary":"An out-of-bounds write flaw in Apple's kernel lets a local app crash the system or write kernel memory. Fixed by Apple's bounds checking in the 27.2 releases.","category":"infrastructure","nicknames":[],"who_cares":["ios","ipados","macos","visionos","apple-devices"],"confidence":0.6,"needs_auth":"no","worst_case":"A local app can crash the system or write kernel memory","analyst_note":"Sources give only the NVD entry; check Apple's security release notes for the affected-version details and whether exploitation is known.","how_to_check":"- Check the device version under Settings > General > About (or `sw_vers -productVersion` on macOS) and compare it to the fixed versions below.","needs_analyst":true,"not_affected_if":["already-on-27.2"],"who_is_affected":"Apple devices running iOS 27.x, iPadOS 27.x, macOS Golden Gate 27.x or visionOS 27.x before 27.2. The sources do not say whether a specific configuration or app is required beyond running a local app. Devices already on 27.2 or later are not affected.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000598,"input_tokens":3292,"output_tokens":537,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':21A,24A '-84494':22A,25A '27.2':64B,85C,88C,92C,94C 'abl':99C 'address':74C 'app':14A,48B,96C 'appl':1A,27B,42B,58B 'apple-devic':26B 'bound':9A,38B,60B,70C,77C 'caus':101C 'check':61B,78C 'crash':15A,49B 'cve':20A,23A 'devic':28B 'fix':56B,82C 'flaw':40B 'gate':91C 'golden':90C 'improv':76C 'infrastructur':29B 'io':2A,30B,84C 'ipado':31B,87C 'issu':72C,80C 'kernel':10A,18A,44B,54B,107C 'let':12A,45B 'local':47B 'maco':3A,32B,89C 'may':97C 'memori':19A,55B,108C 'out-of-bound':6A,35B,67C 'releas':65B 'system':51B,103C 'termin':104C 'unexpect':102C 'visiono':5A,33B,93C 'write':11A,17A,39B,53B,71C,106C","nicknames":[],"mitigations":[],"who_affected":"Apple devices running iOS 27.x, iPadOS 27.x, macOS Golden Gate 27.x or visionOS 27.x before 27.2. The sources do not say whether a specific configuration or app is required beyond running a local app. Devices already on 27.2 or later are not affected.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T21:19:59+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-84494","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84494","severity":null,"published_at":"2026-10-26T21:19:59+00:00","modified_at":"2026-10-26T21:19:59+00:00","first_seen_at":"2026-10-26T21:55:21+00:00","fetched_at":"2026-10-26T21:55:21+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"}