{"id":"CVE-2011-2189","aliases":["DEBIAN-CVE-2011-2189","EUVD-2011-2180","GHSA-cwc9-v946-jvqj"],"status":"published","title":"net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high...","description":"net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.17854,"percentile":0.97192,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-400"],"published":"2011-10-10T10:00:00Z","modified":"2026-10-23T18:03:43Z","exploits":[{"source":"exploitdb","id":"EDB-36425","title":"Linux Kernel 2.6.35 - Network Namespace Remote Denial of Service","type":"dos","platform":"linux","date":"2011-12-06","verified":true,"url":"https://www.exploit-db.com/exploits/36425"}],"fixes":[{"ecosystem":"Debian:12","package":"vsftpd","fixed_in":["2.3.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"vsftpd","fixed_in":["2.3.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"vsftpd","fixed_in":["2.3.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"vsftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"vsftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"vsftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.4-1"}]}]}],"products":[{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"debian","product":"debian_linux"},{"vendor":"linux","product":"linux_kernel"},{"vendor":"redhat","product":"enterprise_linux"},{"vendor":"redhat","product":"enterprise_mrg"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=711245","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue 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Link","web"]},{"url":"http://www.debian.org/security/2011/dsa-2305","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"http://patchwork.ozlabs.org/patch/88217/","tags":["x_refsource_CONFIRM","x_transferred","Mailing List","Patch","Third Party Advisory","advisory","article","fix"]},{"url":"http://kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289","tags":["mailing-list","x_refsource_MLIST","x_transferred","Broken Link","web"]},{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Mailing List","Third Party Advisory","advisory","article","evidence"]},{"url":"http://www.ubuntu.com/usn/USN-1288-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","Third Party 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vsftpd.","status":"published","published":"2011-10-10T10:55:05.503Z","modified":"2026-06-16T23:30:53.227Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:02:10.769216Z"}],"osv":[{"id":"CVE-2011-2189","description":"net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.","status":"published","published":"2011-10-10T10:55:05Z","modified":"2026-04-10T03:41:48.797666Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-2189","description":"net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.","status":"published","published":"2011-10-10T10:55:05.503Z","modified":"2026-10-23T18:03:43.905154967Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:24.612044Z"}]}}