{"id":"CVE-2015-8953","aliases":["DEBIAN-CVE-2015-8953","EUVD-2015-8809","GHSA-xvcx-4642-fhpw","UBUNTU-CVE-2015-8953"],"status":"published","title":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path,...","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00564,"percentile":0.47161,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-399"],"published":"2016-10-16T21:00:00Z","modified":"2026-09-09T07:02:06Z","fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["4.2.6-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["4.2.6-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["4.2.6-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-vivid","fixed_in":["3.19.0-41.46~14.04.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-wily","fixed_in":["4.2.0-19.23~14.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.6-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.6-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.6-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-vivid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.19.0-41.46~14.04.2"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"linux-lts-wily","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0-19.23~14.04.1"}]}],"versions":["4.2.0-18.22~14.04.1"]}],"products":[{"vendor":"linux","product":"linux_kernel"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2016/08/23/9","tags":["mailing-list","x_refsource_MLIST","x_transferred","Exploit","Third Party Advisory","advisory","evidence"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1367814","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","VDB Entry","advisory","report"]},{"url":"http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.6","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Vendor Advisory","advisory","evidence","fix"]},{"url":"https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://www.securityfocus.com/bid/92611","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-8953"},{"url":"https://github.com/advisories/GHSA-xvcx-4642-fhpw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2015-8953","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2015-8953","tags":["report"]},{"url":"http://seclists.org/oss-sec/2016/q3/371","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2015-8953","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2015-8953","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2016-10-16T21:00:00Z","modified":"2024-08-06T08:36:30.423Z","updated_at":"2026-11-02T14:35:40.900357Z"}],"euvd":[{"id":"EUVD-2015-8809","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2016-10-16T21:00:00Z","modified":"2024-08-06T08:36:30Z","updated_at":"2026-11-03T01:57:25.349664Z"}],"ghsa":[{"id":"GHSA-xvcx-4642-fhpw","title":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path,...","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2022-05-17T03:43:36Z","modified":"2023-01-27T05:08:32Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T14:43:18.939561Z"}],"nvd":[{"id":"CVE-2015-8953","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2016-10-16T21:59:03.067Z","modified":"2026-06-17T00:35:33.333Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:03:16.97467Z"}],"osv":[{"id":"CVE-2015-8953","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2016-10-16T21:59:03Z","modified":"2026-04-10T03:46:35.444315Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:01.068991Z"},{"id":"DEBIAN-CVE-2015-8953","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2016-10-16T21:59:03.067Z","modified":"2026-09-09T07:02:06.226019765Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:27.04239Z"},{"id":"UBUNTU-CVE-2015-8953","description":"fs/overlayfs/copy_up.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service (dentry reference leak) via filesystem operations on a large file in a lower overlayfs layer.","status":"published","published":"2016-10-16T21:59:00Z","modified":"2025-09-08T16:43:32Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:11.100633Z"}]}}