{"id":"CVE-2026-84595","kind":"vulnerability","aliases":["CVE-2026-84595"],"related":[],"title":"Apple iOS and macOS: out-of-bounds write can crash the system","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, visionOS 27. An app may be able to cause unexpected system termination.","summary":"An out-of-bounds write flaw in Apple's operating systems lets an app cause an unexpected system termination. The fix is improved bounds checking in iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2 and visionOS 27.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple","infrastructure","ios","ipados","macos","mobile-fleet","visionos"],"not_affected_if":["already-patched-version"],"how_to_check":"- Check the installed OS version under Settings > General > About (iOS, iPadOS, visionOS) or `sw_vers` on macOS.\n- Compare it with the fixed versions: macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, or iOS/iPadOS/visionOS 27.","fix":"- Update iOS and iPadOS to 27 or later.\n- Update macOS Sequoia to 15.8.2, macOS Tahoe to 26.7.2, or move to macOS Golden Gate 27.\n- Update visionOS to 27 or later.","status":"open","published_at":"2026-10-26T21:20:14+00:00","first_seen_at":"2026-10-26T21:55:21+00:00","triaged_at":"2026-10-26T21:57:12+00:00","updated_at":"2026-10-26T21:57:12+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-26T21:57:12Z","model":"claude-haiku-5-5","output":{"fix":"- Update iOS and iPadOS to 27 or later.\n- Update macOS Sequoia to 15.8.2, macOS Tahoe to 26.7.2, or move to macOS Golden Gate 27.\n- Update visionOS to 27 or later.","reach":"local","title":"Apple iOS and macOS: out-of-bounds write can crash the system","impact":"low","summary":"An out-of-bounds write flaw in Apple's operating systems lets an app cause an unexpected system termination. The fix is improved bounds checking in iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2 and visionOS 27.","category":"infrastructure","nicknames":[],"who_cares":["apple","ios","macos","ipados","visionos","mobile-fleet"],"confidence":0.5,"needs_auth":"unknown","worst_case":"A malicious app crashes the whole system","analyst_note":"","how_to_check":"- Check the installed OS version under Settings > General > About (iOS, iPadOS, visionOS) or `sw_vers` on macOS.\n- Compare it with the fixed versions: macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, or iOS/iPadOS/visionOS 27.","needs_analyst":false,"not_affected_if":["already-patched-version"],"who_is_affected":"Anyone running the listed Apple operating systems on personal or managed devices. The impact is a crash of the system, triggered by a local app, so fleets of Apple devices should be updated through normal MDM channels. Devices already on the fixed versions are not affected.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000639,"input_tokens":3307,"output_tokens":617,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-84595':16A,19A '15.8.2':66B,102C '26.7.2':69B,105C '27':57B,59B,63B,72B,92C,95C,99C,107C 'abl':112C 'address':81C 'app':43B,109C 'appl':1A,20B,37B 'bound':8A,33B,53B,77C,84C 'caus':44B,114C 'check':54B,85C 'crash':11A 'cve':14A,17A 'fix':50B,89C 'flaw':35B 'fleet':27B 'gate':62B,98C 'golden':61B,97C 'improv':52B,83C 'infrastructur':21B 'io':2A,22B,56B,91C 'ipado':23B,58B,94C 'issu':79C,87C 'let':41B 'maco':4A,24B,60B,64B,67B,96C,100C,103C 'may':110C 'mobil':26B 'mobile-fleet':25B 'oper':39B 'out-of-bound':5A,30B,74C 'sequoia':65B,101C 'system':13A,40B,47B,116C 'taho':68B,104C 'termin':48B,117C 'unexpect':46B,115C 'visiono':28B,71B,106C 'write':9A,34B,78C","nicknames":[],"mitigations":[],"who_affected":"Anyone running the listed Apple operating systems on personal or managed devices. The impact is a crash of the system, triggered by a local app, so fleets of Apple devices should be updated through normal MDM channels. Devices already on the fixed versions are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T21:20:14+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-84595","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84595","severity":null,"published_at":"2026-10-26T21:20:14+00:00","modified_at":"2026-10-26T21:20:14+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"}