{
  "modified": "2025-08-09T19:01:28Z",
  "published": "2013-04-24T19:55:01Z",
  "id": "CVE-2013-1956",
  "details": "The create_user_ns function in kernel/user_namespace.c in the Linux kernel before 3.8.6 does not check whether a chroot directory exists that differs from the namespace root directory, which allows local users to bypass intended filesystem restrictions via a crafted clone system call.",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/torvalds/linux/commit/3151527ee007b73a0ebd296010f1c0454a919c7d"
    },
    {
      "type": "WEB",
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3151527ee007b73a0ebd296010f1c0454a919c7d"
    },
    {
      "type": "WEB",
      "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.6"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2013/04/16/11"
    }
  ]
}