cve-2024-38580
Vulnerability from cvelistv5
Published
2024-06-19 13:37
Modified
2024-09-11 17:34
Severity
Summary
epoll: be better about file lifetimes
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T04:12:25.965Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/559214eb4e5c3d05e69428af2fae2691ba1eb784"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/4f65f4defe4e23659275ce5153541cd4f76ce2d2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/16e3182f6322575eb7c12e728ad3c7986a189d5d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/4efaa5acf0a1d2b5947f98abb3acf8bfd966422b"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-38580",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:13:59.808885Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:34:55.453Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/eventpoll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cbfd1088e24e",
              "status": "affected",
              "version": "1da177e4c3f4",
              "versionType": "git"
            },
            {
              "lessThan": "559214eb4e5c",
              "status": "affected",
              "version": "1da177e4c3f4",
              "versionType": "git"
            },
            {
              "lessThan": "4f65f4defe4e",
              "status": "affected",
              "version": "1da177e4c3f4",
              "versionType": "git"
            },
            {
              "lessThan": "16e3182f6322",
              "status": "affected",
              "version": "1da177e4c3f4",
              "versionType": "git"
            },
            {
              "lessThan": "4efaa5acf0a1",
              "status": "affected",
              "version": "1da177e4c3f4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/eventpoll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.161",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.93",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.33",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.12",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nepoll: be better about file lifetimes\n\nepoll can call out to vfs_poll() with a file pointer that may race with\nthe last \u0027fput()\u0027. That would make f_count go down to zero, and while\nthe ep-\u003emtx locking means that the resulting file pointer tear-down will\nbe blocked until the poll returns, it means that f_count is already\ndead, and any use of it won\u0027t actually get a reference to the file any\nmore: it\u0027s dead regardless.\n\nMake sure we have a valid ref on the file pointer before we call down to\nvfs_poll() from the epoll routines."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-06-19T13:37:37.840Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e"
        },
        {
          "url": "https://git.kernel.org/stable/c/559214eb4e5c3d05e69428af2fae2691ba1eb784"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f65f4defe4e23659275ce5153541cd4f76ce2d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/16e3182f6322575eb7c12e728ad3c7986a189d5d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4efaa5acf0a1d2b5947f98abb3acf8bfd966422b"
        }
      ],
      "title": "epoll: be better about file lifetimes",
      "x_generator": {
        "engine": "bippy-a5840b7849dd"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-38580",
    "datePublished": "2024-06-19T13:37:37.840Z",
    "dateReserved": "2024-06-18T19:36:34.927Z",
    "dateUpdated": "2024-09-11T17:34:55.453Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-38580\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-19T14:15:18.057\",\"lastModified\":\"2024-06-20T12:44:01.637\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nepoll: be better about file lifetimes\\n\\nepoll can call out to vfs_poll() with a file pointer that may race with\\nthe last \u0027fput()\u0027. That would make f_count go down to zero, and while\\nthe ep-\u003emtx locking means that the resulting file pointer tear-down will\\nbe blocked until the poll returns, it means that f_count is already\\ndead, and any use of it won\u0027t actually get a reference to the file any\\nmore: it\u0027s dead regardless.\\n\\nMake sure we have a valid ref on the file pointer before we call down to\\nvfs_poll() from the epoll routines.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: epoll: mejore la duraci\u00f3n de los archivos epoll puede llamar a vfs_poll() con un puntero de archivo que puede competir con el \u00faltimo \u0027fput()\u0027. Eso har\u00eda que f_count bajara a cero, y aunque el bloqueo ep-\u0026gt;mtx significa que el desmontaje del puntero del archivo resultante se bloquear\u00e1 hasta que regrese la encuesta, significa que f_count ya est\u00e1 muerto y no se podr\u00e1 utilizar. De hecho, ya no obtengo una referencia al archivo: est\u00e1 muerto de todos modos. Aseg\u00farese de tener una referencia v\u00e1lida en el puntero del archivo antes de llamar a vfs_poll() desde las rutinas de epoll.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/16e3182f6322575eb7c12e728ad3c7986a189d5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4efaa5acf0a1d2b5947f98abb3acf8bfd966422b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f65f4defe4e23659275ce5153541cd4f76ce2d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/559214eb4e5c3d05e69428af2fae2691ba1eb784\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading...

Loading...