CVE-2025-40089

{
  "id": "CVE-2025-40089",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-10-30T10:15:33.447",
  "lastModified": "2026-10-19T21:10:00.160",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/features: Add check for no entries in cxl_feature_info\n\ncxl EDAC calls cxl_feature_info() to get the feature information and\nif the hardware has no Features support, cxlfs may be passed in as\nNULL.\n\n[   51.957498] BUG: kernel NULL pointer dereference, address: 0000000000000008\n[   51.965571] #PF: supervisor read access in kernel mode\n[   51.971559] #PF: error_code(0x0000) - not-present page\n[   51.977542] PGD 17e4f6067 P4D 0\n[   51.981384] Oops: Oops: 0000 [#1] SMP NOPTI\n[   51.986300] CPU: 49 UID: 0 PID: 3782 Comm: systemd-udevd Not tainted 6.17.0dj\ntest+ #64 PREEMPT(voluntary)\n[   51.997355] Hardware name: <removed>\n[   52.009790] RIP: 0010:cxl_feature_info+0xa/0x80 [cxl_core]\n\nAdd a check for cxlfs before dereferencing it and return -EOPNOTSUPP if\nthere is no cxlfs created due to no hardware support."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncxl/features: Añadir verificación para ninguna entrada en cxl_feature_info\n\ncxl EDAC llama a cxl_feature_info() para obtener la información de la característica y si el hardware no tiene soporte para Características, cxlfs puede ser pasado como NULL.\n\n[   51.957498] BUG: desreferencia de puntero NULL del kernel, dirección: 0000000000000008\n[   51.965571] #PF: acceso de lectura de supervisor en modo kernel\n[   51.971559] #PF: código_de_error(0x0000) - página no presente\n[   51.977542] PGD 17e4f6067 P4D 0\n[   51.981384] Oops: Oops: 0000 [#1] SMP NOPTI\n[   51.986300] CPU: 49 UID: 0 PID: 3782 Comm: systemd-udevd Not tainted 6.17.0dj\ntest+ #64 PREEMPT(voluntary)\n[   51.997355] Nombre del hardware: <eliminado>\n[   52.009790] RIP: 0010:cxl_feature_info+0xa/0x80 [cxl_core]\n\nAñadir una verificación para cxlfs antes de desreferenciarlo y devolver -EOPNOTSUPP si no hay cxlfs creado debido a la falta de soporte de hardware."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/cxl/core/features.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
              "lessThan": "b8a69e3b1a460bf5d96dd53cbd121aa2cd346886",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
              "lessThan": "a375246fcf2bbdaeb1df7fa7ee5a8b884a89085e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/cxl/core/features.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": "6.17.5",
              "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/a375246fcf2bbdaeb1df7fa7ee5a8b884a89085e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b8a69e3b1a460bf5d96dd53cbd121aa2cd346886",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}