{
  "schema_version": "1.7.0",
  "id": "LSN-0077-1",
  "summary": "Kernel Live Patch Security Notice",
  "details": "Vincent Dehors discovered that the shiftfs file system in the Ubuntu Linux\nkernel did not properly handle faults in copy_from_user() when passing\nthrough ioctls to an underlying file system. A local attacker could use\nthis to cause a denial of service (memory exhaustion) or execute arbitrary\ncode.(CVE-2021-3492)",
  "aliases": [],
  "upstream": [
    "UBUNTU-CVE-2021-3492"
  ],
  "related": [],
  "published": "2021-05-17T07:04:24Z",
  "modified": "2026-06-03T10:46:31Z",
  "affected": [
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "linux-gke-5.4",
        "purl": "pkg:deb/ubuntu/linux-gke-5.4@5.4.0-1042.44~18.04.1?arch=source&distro=bionic"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1042.44~18.04.1"
            }
          ]
        }
      ],
      "versions": [
        "5.4.0-1025.25~18.04.1",
        "5.4.0-1027.28~18.04.1",
        "5.4.0-1029.31~18.04.1",
        "5.4.0-1030.32~18.04.1",
        "5.4.0-1032.34~18.04.1",
        "5.4.0-1033.35~18.04.1",
        "5.4.0-1035.37~18.04.1",
        "5.4.0-1036.38~18.04.1",
        "5.4.0-1037.39~18.04.1",
        "5.4.0-1039.41~18.04.1",
        "5.4.0-1040.42~18.04.1"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_gke_(\\d+)",
        "module_version": "77"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "linux-gkeop-5.4",
        "purl": "pkg:deb/ubuntu/linux-gkeop-5.4@5.4.0-1014.15~18.04.1?arch=source&distro=bionic"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1014.15~18.04.1"
            }
          ]
        }
      ],
      "versions": [
        "5.4.0-1001.1",
        "5.4.0-1003.3",
        "5.4.0-1004.5",
        "5.4.0-1005.6",
        "5.4.0-1007.8~18.04.1",
        "5.4.0-1008.9~18.04.1",
        "5.4.0-1009.10~18.04.1",
        "5.4.0-1010.11~18.04.1",
        "5.4.0-1011.12~18.04.2",
        "5.4.0-1012.13~18.04.1",
        "5.4.0-1013.14~18.04.1"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_gkeop_(\\d+)",
        "module_version": "77"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "linux-hwe-5.4",
        "purl": "pkg:deb/ubuntu/linux-hwe-5.4@5.4.0-72.80~18.04.1?arch=source&distro=bionic"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-72.80~18.04.1"
            }
          ]
        }
      ],
      "versions": [
        "5.4.0-37.41~18.04.1",
        "5.4.0-39.43~18.04.1",
        "5.4.0-40.44~18.04.1",
        "5.4.0-42.46~18.04.1",
        "5.4.0-45.49~18.04.2",
        "5.4.0-47.51~18.04.1",
        "5.4.0-48.52~18.04.1",
        "5.4.0-51.56~18.04.1",
        "5.4.0-52.57~18.04.1",
        "5.4.0-53.59~18.04.1",
        "5.4.0-54.60~18.04.1",
        "5.4.0-56.62~18.04.1",
        "5.4.0-58.64~18.04.1",
        "5.4.0-59.65~18.04.1",
        "5.4.0-60.67~18.04.1",
        "5.4.0-62.70~18.04.1",
        "5.4.0-64.72~18.04.1",
        "5.4.0-65.73~18.04.1",
        "5.4.0-66.74~18.04.2",
        "5.4.0-67.75~18.04.1",
        "5.4.0-70.78~18.04.1",
        "5.4.0-71.79~18.04.1"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_(?:generic|lowlatency)_(\\d+)",
        "module_version": "77"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "linux",
        "purl": "pkg:deb/ubuntu/linux@5.4.0-72.80?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-72.80"
            }
          ]
        }
      ],
      "versions": [
        "5.3.0-18.19",
        "5.3.0-24.26",
        "5.4.0-9.12",
        "5.4.0-18.22",
        "5.4.0-21.25",
        "5.4.0-24.28",
        "5.4.0-25.29",
        "5.4.0-26.30",
        "5.4.0-28.32",
        "5.4.0-29.33",
        "5.4.0-31.35",
        "5.4.0-33.37",
        "5.4.0-37.41",
        "5.4.0-39.43",
        "5.4.0-40.44",
        "5.4.0-42.46",
        "5.4.0-45.49",
        "5.4.0-47.51",
        "5.4.0-48.52",
        "5.4.0-51.56",
        "5.4.0-52.57",
        "5.4.0-53.59",
        "5.4.0-54.60",
        "5.4.0-56.62",
        "5.4.0-58.64",
        "5.4.0-59.65",
        "5.4.0-60.67",
        "5.4.0-62.70",
        "5.4.0-64.72",
        "5.4.0-65.73",
        "5.4.0-66.74",
        "5.4.0-67.75",
        "5.4.0-70.78",
        "5.4.0-71.79"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_(?:generic|lowlatency)_(\\d+)",
        "module_version": "77"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "linux-gcp",
        "purl": "pkg:deb/ubuntu/linux-gcp@5.4.0-1042.45?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1042.45"
            }
          ]
        }
      ],
      "versions": [
        "5.3.0-1004.4",
        "5.3.0-1009.10",
        "5.3.0-1011.12",
        "5.4.0-1005.5",
        "5.4.0-1007.7",
        "5.4.0-1008.8",
        "5.4.0-1009.9",
        "5.4.0-1011.11",
        "5.4.0-1015.15",
        "5.4.0-1018.18",
        "5.4.0-1019.19",
        "5.4.0-1021.21",
        "5.4.0-1022.22",
        "5.4.0-1024.24",
        "5.4.0-1025.25",
        "5.4.0-1028.29",
        "5.4.0-1029.31",
        "5.4.0-1030.32",
        "5.4.0-1032.34",
        "5.4.0-1033.35",
        "5.4.0-1034.37",
        "5.4.0-1036.39",
        "5.4.0-1037.40",
        "5.4.0-1038.41",
        "5.4.0-1040.43",
        "5.4.0-1041.44"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_gcp_(\\d+)",
        "module_version": "77"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "linux-gke",
        "purl": "pkg:deb/ubuntu/linux-gke@5.4.0-1042.44?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
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            {
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            }
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      "versions": [
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        "5.4.0-1036.38",
        "5.4.0-1037.39",
        "5.4.0-1039.41",
        "5.4.0-1041.43"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_gke_(\\d+)",
        "module_version": "77"
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "linux-gkeop",
        "purl": "pkg:deb/ubuntu/linux-gkeop@5.4.0-1014.15?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1014.15"
            }
          ]
        }
      ],
      "versions": [
        "5.4.0-1008.9",
        "5.4.0-1009.10",
        "5.4.0-1010.11",
        "5.4.0-1011.12",
        "5.4.0-1012.13",
        "5.4.0-1013.14"
      ],
      "ecosystem_specific": {
        "availability": "Livepatch subscription required",
        "module_name_regex": "lkp_Ubuntu_5_4_0[_|\\d]+_gkeop_(\\d+)",
        "module_version": "77"
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/LSN-0077-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3492"
    }
  ]
}