{"id":"CVE-2026-40369","aliases":["EUVD-2026-29651","GHSA-4qhv-qjg6-r699"],"status":"published","title":"Windows Kernel Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.04725,"percentile":0.91956,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-822"],"published":"2026-05-12T16:59:21Z","modified":"2026-11-03T23:17:43Z","exploits":[{"source":"pocgithub","id":"orinimron123/CVE-2026-40369-EXPLOIT","title":"orinimron123/CVE-2026-40369-EXPLOIT","date":"2026-05-13","url":"https://github.com/orinimron123/CVE-2026-40369-EXPLOIT"},{"source":"pocgithub","id":"ercihan/CVE-2026-40369","title":"ercihan/CVE-2026-40369","date":"2026-05-21","url":"https://github.com/ercihan/CVE-2026-40369"},{"source":"pocgithub","id":"piffd0s/ntoskrnl-metadata","title":"piffd0s/ntoskrnl-metadata","date":"2026-05-22","url":"https://github.com/piffd0s/ntoskrnl-metadata"},{"source":"pocgithub","id":"ashrafzaryouh/CVE-2026-40369","title":"ashrafzaryouh/CVE-2026-40369","date":"2026-06-18","url":"https://github.com/ashrafzaryouh/CVE-2026-40369"},{"source":"pocgithub","id":"CCELEND/CVE-2026-40369","title":"CCELEND/CVE-2026-40369","date":"2026-06-23","url":"https://github.com/CCELEND/CVE-2026-40369"},{"source":"pocgithub","id":"dbgbgtf1/cve-2026-40369-exploit","title":"dbgbgtf1/cve-2026-40369-exploit","date":"2026-09-08","url":"https://github.com/dbgbgtf1/cve-2026-40369-exploit"}],"products":[{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40369"},{"url":"https://github.com/advisories/GHSA-4qhv-qjg6-r699"}],"sources":{"cve":[{"id":"CVE-2026-40369","title":"Windows Kernel Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:59:21.712Z","modified":"2026-11-03T22:13:24.124Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-822"],"updated_at":"2026-11-03T23:33:09.822755Z"}],"euvd":[{"id":"EUVD-2026-29651","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:59:21Z","modified":"2026-11-03T22:13:24Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T23:01:34.013136Z"}],"ghsa":[{"id":"GHSA-4qhv-qjg6-r699","title":"Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate...","description":"Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:30:44Z","modified":"2026-05-12T18:30:50Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-822"],"updated_at":"2026-11-02T15:08:05.647564Z"}],"nvd":[{"id":"CVE-2026-40369","description":"Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:17:16.023Z","modified":"2026-11-03T23:17:43.373Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-822"],"updated_at":"2026-11-04T01:48:30.872109Z"}]}}