{"id":"CVE-2016-1575","aliases":["DEBIAN-CVE-2016-1575","EUVD-2016-2670","GHSA-mgq6-h57w-6g82","UBUNTU-CVE-2016-1575","USN-2907-1","USN-2908-2","USN-2909-1","USN-2910-1"],"status":"published","title":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX...","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","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","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00923,"percentile":0.60619,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-269"],"published":"2016-02-22T00:00:00Z","modified":"2026-09-22T07:01:25Z","exploits":[{"source":"exploitdb","id":"EDB-41762","title":"Ubuntu 14.04/15.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation","type":"local","platform":"linux","date":"2016-11-22","url":"https://www.exploit-db.com/exploits/41762"}],"fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["4.5.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["4.5.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["4.5.1-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux","fixed_in":["3.13.0-79.123"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-utopic","fixed_in":["3.16.0-62.82~14.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-vivid","fixed_in":["3.19.0-51.57~14.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-wily","fixed_in":["4.2.0-30.35~14.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.1-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.0-79.123"}]}],"versions":["3.11.0-12.19","3.12.0-1.3","3.12.0-2.5","3.12.0-2.7","3.12.0-3.8","3.12.0-3.9","3.12.0-4.10","3.12.0-4.12","3.12.0-5.13","3.12.0-7.15","3.13.0-1.16","3.13.0-2.17","3.13.0-3.18","3.13.0-4.19","3.13.0-5.20","3.13.0-6.23","3.13.0-7.25","3.13.0-7.26","3.13.0-8.27","3.13.0-8.28","3.13.0-10.30","3.13.0-11.31","3.13.0-12.32","3.13.0-13.33","3.13.0-14.34","3.13.0-15.35","3.13.0-16.36","3.13.0-17.37","3.13.0-18.38","3.13.0-19.39","3.13.0-19.40","3.13.0-20.42","3.13.0-21.43","3.13.0-22.44","3.13.0-23.45","3.13.0-24.46","3.13.0-24.47","3.13.0-27.50","3.13.0-29.53","3.13.0-30.54","3.13.0-30.55","3.13.0-32.57","3.13.0-33.58","3.13.0-34.60","3.13.0-35.62","3.13.0-36.63","3.13.0-37.64","3.13.0-39.66","3.13.0-40.69","3.13.0-41.70","3.13.0-43.72","3.13.0-44.73","3.13.0-45.74","3.13.0-46.75","3.13.0-46.76","3.13.0-46.77","3.13.0-46.79","3.13.0-48.80","3.13.0-49.81","3.13.0-49.83","3.13.0-51.84","3.13.0-52.85","3.13.0-52.86","3.13.0-53.88","3.13.0-53.89","3.13.0-54.91","3.13.0-55.92","3.13.0-55.94","3.13.0-57.95","3.13.0-58.97","3.13.0-59.98","3.13.0-61.100","3.13.0-62.102","3.13.0-63.103","3.13.0-65.105","3.13.0-65.106","3.13.0-66.108","3.13.0-67.110","3.13.0-68.111","3.13.0-70.113","3.13.0-71.114","3.13.0-73.116","3.13.0-74.118","3.13.0-76.120","3.13.0-77.121"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-utopic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.0-62.82~14.04.1"}]}],"versions":["3.16.0-25.33~14.04.2","3.16.0-26.35~14.04.1","3.16.0-28.37~14.04.1","3.16.0-28.38~14.04.1","3.16.0-29.39~14.04.1","3.16.0-30.40~14.04.1","3.16.0-31.41~14.04.1","3.16.0-31.43~14.04.1","3.16.0-33.44~14.04.1","3.16.0-34.45~14.04.1","3.16.0-34.47~14.04.1","3.16.0-36.48~14.04.1","3.16.0-37.49~14.04.1","3.16.0-37.51~14.04.1","3.16.0-38.52~14.04.1","3.16.0-39.53~14.04.1","3.16.0-40.54~14.04.1","3.16.0-41.55~14.04.1","3.16.0-41.57~14.04.1","3.16.0-43.58~14.04.1","3.16.0-44.59~14.04.1","3.16.0-45.60~14.04.1","3.16.0-46.62~14.04.1","3.16.0-48.64~14.04.1","3.16.0-49.65~14.04.1","3.16.0-50.66~14.04.1","3.16.0-50.67~14.04.1","3.16.0-51.69~14.04.1","3.16.0-52.71~14.04.1","3.16.0-53.72~14.04.1","3.16.0-55.74~14.04.1","3.16.0-56.75~14.04.1","3.16.0-57.77~14.04.1","3.16.0-59.79~14.04.1","3.16.0-60.80~14.04.1"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-vivid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.19.0-51.57~14.04.1"}]}],"versions":["3.19.0-18.18~14.04.1","3.19.0-20.20~14.04.1","3.19.0-21.21~14.04.1","3.19.0-22.22~14.04.1","3.19.0-23.24~14.04.1","3.19.0-25.26~14.04.1","3.19.0-26.28~14.04.1","3.19.0-28.30~14.04.1","3.19.0-30.33~14.04.1","3.19.0-30.34~14.04.1","3.19.0-31.36~14.04.1","3.19.0-32.37~14.04.1","3.19.0-33.38~14.04.1","3.19.0-37.42~14.04.1","3.19.0-39.44~14.04.1","3.19.0-41.46~14.04.2","3.19.0-42.48~14.04.1","3.19.0-43.49~14.04.1","3.19.0-47.53~14.04.1","3.19.0-49.55~14.04.1"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-wily","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0-30.35~14.04.1"}]}],"versions":["4.2.0-18.22~14.04.1","4.2.0-19.23~14.04.1","4.2.0-21.25~14.04.1","4.2.0-22.27~14.04.1","4.2.0-23.28~14.04.1","4.2.0-25.30~14.04.1","4.2.0-27.32~14.04.1"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.13.0-79.123"}]}],"versions":["3.11.0-12.19","3.12.0-1.3","3.12.0-2.5","3.12.0-2.7","3.12.0-3.8","3.12.0-3.9","3.12.0-4.10","3.12.0-4.12","3.12.0-5.13","3.12.0-7.15","3.13.0-1.16","3.13.0-2.17","3.13.0-3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Advisory","fix"]},{"url":"http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://launchpad.net/bugs/1534961","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"http://www.openwall.com/lists/oss-security/2016/02/24/7","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2021/10/18/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-1575"},{"url":"http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation"},{"url":"https://github.com/advisories/GHSA-mgq6-h57w-6g82"},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-1575","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-1575","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2910-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2908-3","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2908-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2907-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2909-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2907-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-2908-2","tags":["advisory"]},{"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/trusty/commit/?id=4dc7ebf4284cdc90e8f3cd617ed247aade2ca39f","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-1575","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7550","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-8543","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-8569","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-8575","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-8785","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-1576","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2013-4312","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2069","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2016-1575","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2016-05-02T10:00:00Z","modified":"2024-08-05T23:02:12.188Z","updated_at":"2026-11-02T14:33:35.841056Z"}],"euvd":[{"id":"EUVD-2016-2670","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2016-05-02T10:00:00Z","modified":"2024-08-05T23:02:12Z","updated_at":"2026-11-03T02:22:56.538135Z"}],"ghsa":[{"id":"GHSA-mgq6-h57w-6g82","title":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX...","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2022-05-13T01:02:14Z","modified":"2025-04-12T13:00:26Z","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-269"],"updated_at":"2026-11-02T15:01:27.480327Z"}],"nvd":[{"id":"CVE-2016-1575","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2016-05-02T10:59:23.237Z","modified":"2026-06-17T00:42:11.733Z","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":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:03:23.795791Z"}],"osv":[{"id":"CVE-2016-1575","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2016-05-02T10:59:23.237Z","modified":"2026-03-14T14:08:28.430819Z","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"}],"updated_at":"2026-11-02T15:44:02.114472Z"},{"id":"DEBIAN-CVE-2016-1575","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2016-05-02T10:59:23.237Z","modified":"2026-09-22T07:01:25.907433738Z","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"}],"updated_at":"2026-11-02T15:45:27.323751Z"},{"id":"UBUNTU-CVE-2016-1575","description":"The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","status":"published","published":"2016-02-22T00:00:00Z","modified":"2026-04-22T10:30:52.401322Z","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"},{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:11.492576Z"},{"id":"USN-2907-1","title":"linux vulnerabilities","description":"halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,\nincorrectly propagated file attributes, including setuid. A local\nunprivileged attacker could use this to gain privileges. (CVE-2016-1576)\n\nhalfdog discovered that OverlayFS in the Linux kernel incorrectly\npropagated security sensitive extended attributes, such as\nPOSIX ACLs. A local unprivileged attacker could use this to gain\nprivileges. (CVE-2016-1575)\n\nIt was discovered that the Linux kernel keyring subsystem contained a race\nbetween read and revoke operations. A local attacker could use this to\ncause a denial of service (system crash). (CVE-2015-7550)\n\n郭永刚 discovered that the Linux kernel networking implementation did\nnot validate protocol identifiers for certain protocol families, A local\nattacker could use this to cause a denial of service (system crash) or\npossibly gain administrative privileges. (CVE-2015-8543)\n\nDmitry Vyukov discovered that the pptp implementation in the Linux kernel\ndid not verify an address length when setting up a socket. A local attacker\ncould use this to craft an application that exposed sensitive information\nfrom kernel memory. (CVE-2015-8569)\n\nDavid Miller discovered that the Bluetooth implementation in the Linux\nkernel did not properly validate the socket address length for Synchronous\nConnection-Oriented (SCO) sockets. A local attacker could use this to\nexpose sensitive information. (CVE-2015-8575)\n\nIt was discovered that the Linux kernel's Filesystem in Userspace (FUSE)\nimplementation did not handle initial zero length segments properly. A\nlocal attacker could use this to cause a denial of service (unkillable\ntask). (CVE-2015-8785)\n","status":"published","published":"2016-02-22T19:44:22Z","modified":"2026-04-22T09:21:48.640081Z","updated_at":"2026-11-02T16:58:10.303275Z"},{"id":"USN-2908-2","title":"linux-lts-wily vulnerabilities","description":"halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,\nincorrectly propagated file attributes, including setuid. A local\nunprivileged attacker could use this to gain privileges. (CVE-2016-1576)\n\nhalfdog discovered that OverlayFS in the Linux kernel incorrectly\npropagated security sensitive extended attributes, such as POSIX ACLs. A\nlocal unprivileged attacker could use this to gain privileges.\n(CVE-2016-1575)\n\nIt was discovered that the Linux kernel did not properly enforce rlimits\nfor file descriptors sent over UNIX domain sockets. A local attacker could\nuse this to cause a denial of service. (CVE-2013-4312)\n\nIt was discovered that the Linux kernel's Filesystem in Userspace (FUSE)\nimplementation did not handle initial zero length segments properly. A\nlocal attacker could use this to cause a denial of service (unkillable\ntask). (CVE-2015-8785)\n\nAndy Lutomirski discovered a race condition in the Linux kernel's\ntranslation lookaside buffer (TLB) handling of flush events. A local\nattacker could use this to cause a denial of service or possibly leak\nsensitive information. (CVE-2016-2069)\n","status":"published","published":"2016-02-22T20:42:03Z","modified":"2026-02-10T04:40:57Z","updated_at":"2026-11-02T16:58:10.303275Z"},{"id":"USN-2909-1","title":"linux-lts-utopic vulnerabilities","description":"halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,\nincorrectly propagated file attributes, including setuid. A local\nunprivileged attacker could use this to gain privileges. (CVE-2016-1576)\n\nhalfdog discovered that OverlayFS in the Linux kernel incorrectly\npropagated security sensitive extended attributes, such as POSIX ACLs. A\nlocal unprivileged attacker could use this to gain privileges.\n(CVE-2016-1575)\n\nIt was discovered that the Linux kernel's Filesystem in Userspace (FUSE)\nimplementation did not handle initial zero length segments properly. A\nlocal attacker could use this to cause a denial of service (unkillable\ntask). (CVE-2015-8785)\n","status":"published","published":"2016-02-22T21:09:23Z","modified":"2026-02-10T04:40:57Z","updated_at":"2026-11-02T16:58:10.303275Z"},{"id":"USN-2910-1","title":"linux-lts-vivid vulnerabilities","description":"halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,\nincorrectly propagated file attributes, including setuid. A local\nunprivileged attacker could use this to gain privileges. (CVE-2016-1576)\n\nhalfdog discovered that OverlayFS in the Linux kernel incorrectly\npropagated security sensitive extended attributes, such as POSIX ACLs. A\nlocal unprivileged attacker could use this to gain privileges.\n(CVE-2016-1575)\n\nIt was discovered that the Linux kernel keyring subsystem contained a race\nbetween read and revoke operations. A local attacker could use this to\ncause a denial of service (system crash). (CVE-2015-7550)\n\n郭永刚 discovered that the Linux kernel networking implementation did\nnot validate protocol identifiers for certain protocol families, A local\nattacker could use this to cause a denial of service (system crash) or\npossibly gain administrative privileges. (CVE-2015-8543)\n\nDmitry Vyukov discovered that the pptp implementation in the Linux kernel\ndid not verify an address length when setting up a socket. A local attacker\ncould use this to craft an application that exposed sensitive information\nfrom kernel memory. (CVE-2015-8569)\n\nDavid Miller discovered that the Bluetooth implementation in the Linux\nkernel did not properly validate the socket address length for Synchronous\nConnection-Oriented (SCO) sockets. A local attacker could use this to\nexpose sensitive information. (CVE-2015-8575)\n\nIt was discovered that the Linux kernel's Filesystem in Userspace (FUSE)\nimplementation did not handle initial zero length segments properly. A\nlocal attacker could use this to cause a denial of service (unkillable\ntask). (CVE-2015-8785)\n","status":"published","published":"2016-02-22T21:24:38Z","modified":"2026-02-10T04:40:57Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}