{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.22"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.23"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.24"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.25"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.26"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.27"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.4.28"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application.  NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.",
  "id": "CVE-2016-9644",
  "modified": "2026-03-15T21:50:21.298613079Z",
  "published": "2016-11-28T03:59:18.283Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lwn.net/Articles/705220/"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/94545"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.ubuntu.com/usn/USN-3146-2"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2016/11/07/4"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.ubuntu.com/usn/USN-3146-1"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}