{"id":"CVE-2026-86940","kind":"vulnerability","aliases":["CVE-2026-86940"],"related":[],"title":"Apple macOS: app can disclose kernel memory, fixed in Golden Gate 27","description":"This issue was addressed by removing the vulnerable code. This issue is fixed in macOS Golden Gate 27. An app may be able to disclose kernel memory.","summary":"A local app on macOS can read kernel memory it should not be able to see. Apple fixed it in macOS Golden Gate 27 by removing the vulnerable code.","severity":"medium","cvss":5.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple-devices","endpoints","infrastructure","macos"],"not_affected_if":["macos-golden-gate-27-or-later"],"how_to_check":"- Run `sw_vers -productVersion` on each Mac and compare against the fixed release the advisory names\n- unknown whether the sources list a specific affected build range","fix":"- Update macOS to Golden Gate 27 or later via System Settings > General > Software Update","status":"open","published_at":"2026-10-20T01:17:28+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","triaged_at":"2026-10-25T04:12:36+00:00","updated_at":"2026-10-25T04:12:36+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-25T04:12:36Z","model":"claude-haiku-5-5","output":{"fix":"- Update macOS to Golden Gate 27 or later via System Settings > General > Software Update","reach":"local","title":"Apple macOS: app can disclose kernel memory, fixed in Golden Gate 27","impact":"medium","summary":"A local app on macOS can read kernel memory it should not be able to see. Apple fixed it in macOS Golden Gate 27 by removing the vulnerable code.","category":"infrastructure","nicknames":[],"who_cares":["macos","apple-devices","endpoints"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Kernel memory contents readable by a local app","analyst_note":"Check Apple's security notes for Golden Gate 27 to find affected builds and the exact kernel memory exposed.","how_to_check":"- Run `sw_vers -productVersion` on each Mac and compare against the fixed release the advisory names\n- unknown whether the sources list a specific affected build range","needs_analyst":true,"not_affected_if":["macos-golden-gate-27-or-later"],"who_is_affected":"Any Mac running a macOS version before Golden Gate 27 can be affected, as the sources describe a local app reading kernel memory. The sources do not say which earlier builds are affected or whether any special configuration is needed. Managed fleets that already run Golden Gate 27 can skip it.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000578,"input_tokens":3250,"output_tokens":505,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-86940':15A,18A '27':12A,48B,71C 'abl':38B,76C 'address':57C 'app':3A,27B,73C 'appl':1A,20B,41B 'apple-devic':19B 'code':53B,62C 'cve':13A,16A 'devic':21B 'disclos':5A,78C 'endpoint':22B 'fix':8A,42B,66C 'gate':11A,47B,70C 'golden':10A,46B,69C 'infrastructur':23B 'issu':55C,64C 'kernel':6A,32B,79C 'local':26B 'maco':2A,24B,29B,45B,68C 'may':74C 'memori':7A,33B,80C 'read':31B 'remov':50B,59C 'see':40B 'vulner':52B,61C","nicknames":[],"mitigations":[],"who_affected":"Any Mac running a macOS version before Golden Gate 27 can be affected, as the sources describe a local app reading kernel memory. The sources do not say which earlier builds are affected or whether any special configuration is needed. Managed fleets that already run Golden Gate 27 can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T01:17:28+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-86940","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86940","severity":null,"published_at":"2026-10-20T01:17:28+00:00","modified_at":"2026-10-20T16:17:15+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","fetched_at":"2026-10-23T22:28:57+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"}