{"id":"CVE-2020-27950","kind":"vulnerability","aliases":["CVE-2020-27950"],"related":[],"title":"Apple Multiple Products: Apple Multiple Products Memory Initialization Vulnerability","description":"A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.","summary":"Apple iOS, iPadOS, macOS and watchOS have a memory initialization flaw that lets a malicious app read kernel memory. Reading kernel memory can leak data useful for escaping app sandboxes and defeating kernel protections.","severity":"high","cvss":7.1,"epss":0.1652,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Apple Multiple Products","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apple-devices","exploited","ios","ipados","macos","vendor","watchos"],"not_affected_if":["fully-patched-devices"],"how_to_check":"Check the device OS version in Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare it with the patched release listed in Apple's security notes.","fix":"Update iOS, iPadOS, macOS and watchOS to the latest versions per Apple's vendor instructions.","status":"open","published_at":"2020-12-08T21:15:13+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:39:39+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:39:39Z","model":"claude-haiku-5-5","output":{"fix":"Update iOS, iPadOS, macOS and watchOS to the latest versions per Apple's vendor instructions.\nunknown","reach":"local","impact":"medium","summary":"Apple iOS, iPadOS, macOS and watchOS have a memory initialization flaw that lets a malicious app read kernel memory. Reading kernel memory can leak data useful for escaping app sandboxes and defeating kernel protections.","category":"vendor","who_cares":["ios","ipados","macos","watchos","apple-devices"],"confidence":0.6,"needs_auth":"no","worst_case":"Malicious app reads kernel memory, aiding sandbox escape and privilege escalation.","analyst_note":"Find the exact patched Apple OS versions for CVE-2020-27950 in Apple's security content pages; sources give no fixed version.","how_to_check":"Check the device OS version in Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare it with the patched release listed in Apple's security notes.\nunknown\nunknown","needs_analyst":true,"not_affected_if":["fully-patched-devices"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000497,"input_tokens":2834,"output_tokens":428,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-006':86C,92C '-2020':11A,14A '-27950':12A,15A '10.15.7':103C,108C '11.0.1':76C '12.4.9':80C '14.2':95C,98C '2020':85C,91C '5.3.9':100C '6.2.9':82C '7.1':78C 'abl':115C 'address':67C 'app':43B,56B 'appl':1A,4A,20B,28B 'apple':16A 'apple-devic':19B 'applic':112C 'big':74C 'catalina':102C,107C 'cve':10A,13A 'data':52B 'defeat':59B 'devic':21B 'disclos':117C 'escap':55B 'exploit':22B 'fix':71C 'flaw':38B 'high':87C 'initi':8A,37B,64C 'io':23B,29B,79C,94C 'ipado':24B,30B,97C 'issu':65C,69C 'kernel':45B,48B,60B,118C 'leak':51B 'let':40B 'maco':25B,31B,73C,101C,106C 'malici':42B,111C 'may':113C 'memori':7A,36B,46B,49B,63C,119C 'mojav':93C 'multipl':2A,5A 'multiple':17A 'product':3A,6A 'products':18A 'protect':61B 'read':44B,47B 'sandbox':57B 'secur':83C,89C 'sierra':88C 'supplement':104C 'sur':75C 'updat':84C,90C,105C,109C 'use':53B 'vendor':26B 'vulner':9A 'watcho':27B,33B,77C,81C,99C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-12-08T21:15:13+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","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:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-27950","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-27950","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T10:39:08+00:00","note":null},{"source":"epss","external_id":"CVE-2020-27950","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-27950","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-27950","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27950","severity":null,"published_at":"2020-12-08T21:15:13+00:00","modified_at":"2026-06-17T03:09:55+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"}