{"id":"CVE-2026-113761","aliases":["EUVD-2026-121926","GHSA-fv63-72fw-q3qf"],"status":"published","title":"Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability","description":"Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/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":"2026-11-14","score":0.00236,"percentile":0.14669,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362","CWE-822"],"published":"2026-11-10T18:18:46Z","modified":"2026-11-10T21:32:54Z","products":[{"vendor":"microsoft","product":"windows 11 version 26h1"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-113761","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113761"},{"url":"https://github.com/advisories/GHSA-fv63-72fw-q3qf"}],"sources":{"cve":[{"id":"CVE-2026-113761","title":"Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability","description":"Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:18:46.284Z","modified":"2026-11-13T18:07:36.539Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/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","CWE-362"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-121926","description":"Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:18:46Z","modified":"2026-11-13T18:07:36Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:33.201322Z"}],"ghsa":[{"id":"GHSA-fv63-72fw-q3qf","title":"Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys)...","description":"Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T21:32:47Z","modified":"2026-11-10T21:32:54Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-362"],"updated_at":"2026-11-10T21:57:51.137748Z"}],"nvd":[{"id":"CVE-2026-113761","description":"Untrusted pointer dereference in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T19:18:55.013Z","modified":"2026-11-10T21:18:53.657Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-362","CWE-822"],"updated_at":"2026-11-11T00:21:54.23974Z"}]}}