CVE-2025-40228

{
  "id": "CVE-2025-40228",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-12-04T16:16:15.460",
  "lastModified": "2026-10-19T19:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs: catch commit test ctx alloc failure\n\nPatch series \"mm/damon/sysfs: fix commit test damon_ctx [de]allocation\".\n\nDAMON sysfs interface dynamically allocates and uses a damon_ctx object\nfor testing if given inputs for online DAMON parameters update is valid.\nThe object is being used without an allocation failure check, and leaked\nwhen the test succeeds.  Fix the two bugs.\n\n\nThis patch (of 2):\n\nThe damon_ctx for testing online DAMON parameters commit inputs is used\nwithout its allocation failure check.  This could result in an invalid\nmemory access.  Fix it by directly returning an error when the allocation\nfailed."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmm/damon/sysfs: detectar fallo de asignación de ctx de prueba de commit\n\nSerie de parches “mm/damon/sysfs: corregir la [des]asignación de damon_ctx de prueba de commit”.\n\nLa interfaz sysfs de DAMON asigna y utiliza dinámicamente un objeto damon_ctx para probar si las entradas dadas para la actualización de parámetros DAMON en línea son válidas. El objeto se está utilizando sin una comprobación de fallo de asignación, y se produce una fuga cuando la prueba tiene éxito. Corregir los dos errores.\n\nEste parche (de 2):\n\nEl damon_ctx para probar las entradas de commit de los parámetros DAMON en línea se utiliza sin su comprobación de fallo de asignación. Esto podría resultar en un acceso a memoria no válido. Corregirlo devolviendo directamente un error cuando la asignación falló."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "mm/damon/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4c9ea539ad59ec60676930dacee02b7adde2e0c0",
              "lessThan": "5b3609d9b9650bdea0bfdf643e0ce57e1aed67fc",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4c9ea539ad59ec60676930dacee02b7adde2e0c0",
              "lessThan": "f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "mm/damon/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.6",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/5b3609d9b9650bdea0bfdf643e0ce57e1aed67fc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f0c5118ebb0eb7e4fd6f0d2ace3315ca141b317f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}