{"id":"CVE-2026-113771","aliases":["EUVD-2026-121936","GHSA-w98q-m7cp-mvqm"],"status":"published","title":"Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability","description":"Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.00393,"percentile":0.34078,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-193"],"published":"2026-11-10T18:18:51Z","modified":"2026-11-10T21:32:49Z","products":[{"vendor":"microsoft","product":"windows 11 version 26h1"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-113771","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113771"},{"url":"https://github.com/advisories/GHSA-w98q-m7cp-mvqm"}],"sources":{"cve":[{"id":"CVE-2026-113771","title":"Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability","description":"Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:18:51.682Z","modified":"2026-11-13T18:07:41.753Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-193"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-121936","description":"Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T18:18:51Z","modified":"2026-11-13T18:07:41Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T23:24:33.201322Z"}],"ghsa":[{"id":"GHSA-w98q-m7cp-mvqm","title":"Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an...","description":"Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T21:32:48Z","modified":"2026-11-10T21:32:49Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-193"],"updated_at":"2026-11-10T21:57:50.285633Z"}],"nvd":[{"id":"CVE-2026-113771","description":"Off-by-one error in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-11-10T19:18:57.45Z","modified":"2026-11-10T21:18:55.1Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-193"],"updated_at":"2026-11-11T00:21:54.23974Z"}]}}