{"id":"CVE-2026-84495","kind":"vulnerability","aliases":["CVE-2026-84495"],"related":[],"title":"Apple iOS and macOS: use-after-free lets an app write kernel memory","description":"A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, tvOS 27.2, visionOS 27.2, watchOS 27.2. An app may be able to cause unexpected system termination or write kernel memory.","summary":"A use-after-free flaw in Apple's operating system memory handling lets an app crash the system or write kernel memory. Fixed releases are iOS 26.7.2, iPadOS 26.7.2, iOS 27.2, iPadOS 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, tvOS 27.2, visionOS 27.2 and watchOS 27.2.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple-devices","infrastructure","ios","ipados","macos","tvos","visionos","watchos"],"not_affected_if":[],"how_to_check":"- Check the device's OS version in Settings > General > About (iOS, iPadOS, visionOS, watchOS, tvOS) or run `sw_vers` on macOS.\n- unknown for any other exposure check; the sources do not say.","fix":"- Update iOS and iPadOS to `26.7.2` or `27.2`.\n- Update macOS Tahoe to `26.7.2`, macOS Sequoia to `15.8.2`, and macOS Golden Gate to `27.2`.\n- Update tvOS, visionOS and watchOS 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 `26.7.2` or `27.2`.\n- Update macOS Tahoe to `26.7.2`, macOS Sequoia to `15.8.2`, and macOS Golden Gate to `27.2`.\n- Update tvOS, visionOS and watchOS to `27.2`.","reach":"local","title":"Apple iOS and macOS: use-after-free lets an app write kernel memory","impact":"high","summary":"A use-after-free flaw in Apple's operating system memory handling lets an app crash the system or write kernel memory. Fixed releases are iOS 26.7.2, iPadOS 26.7.2, iOS 27.2, iPadOS 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, tvOS 27.2, visionOS 27.2 and watchOS 27.2.","category":"infrastructure","nicknames":[],"who_cares":["ios","ipados","macos","tvos","visionos","watchos","apple-devices"],"confidence":0.6,"needs_auth":"unknown","worst_case":"A local app can write kernel memory and take over the system.","analyst_note":"Check Apple's security release notes for CVE-2026-84495 to confirm the attack preconditions and whether the kernel write is reachable from a sandboxed app.","how_to_check":"- Check the device's OS version in Settings > General > About (iOS, iPadOS, visionOS, watchOS, tvOS) or run `sw_vers` on macOS.\n- unknown for any other exposure check; the sources do not say.","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Any Apple device running an affected OS version is exposed, since the flaw is in the operating system kernel and memory handling. Teams that manage Apple fleets should update all devices; the sources do not say whether any configuration avoids the issue.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000687,"input_tokens":3353,"output_tokens":704,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':16A,19A '-84495':17A,20A '15.8.2':71B,115C '26.7.2':58B,60B,74B,100C,103C,118C '27.2':62B,64B,68B,76B,78B,81B,105C,108C,112C,120C,122C,124C 'abl':129C 'address':89C 'app':11A,46B,126C 'appl':1A,22B,38B 'apple-devic':21B 'caus':131C 'crash':47B 'cve':15A,18A 'devic':23B 'fix':54B,97C 'flaw':36B 'free':8A,35B,86C 'gate':67B,111C 'golden':66B,110C 'handl':43B 'improv':91C 'infrastructur':24B 'io':2A,25B,57B,61B,99C,104C 'ipado':26B,59B,63B,102C,107C 'issu':87C,95C 'kernel':13A,52B,137C 'let':9A,44B 'maco':4A,27B,65B,69B,72B,109C,113C,116C 'manag':93C 'may':127C 'memori':14A,42B,53B,92C,138C 'oper':40B 'releas':55B 'sequoia':70B,114C 'system':41B,49B,133C 'taho':73B,117C 'termin':134C 'tvos':28B,75B,119C 'unexpect':132C 'use':6A,33B,84C 'use-after-fre':5A,32B,83C 'visiono':29B,77B,121C 'watcho':30B,80B,123C 'write':12A,51B,136C","nicknames":[],"mitigations":[],"who_affected":"Any Apple device running an affected OS version is exposed, since the flaw is in the operating system kernel and memory handling. Teams that manage Apple fleets should update all devices; the sources do not say whether any configuration avoids the issue.","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-2026-84495","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84495","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"}