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CVE-2025-40031

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

tee: fix register_shm_helper()

In register_shm_helper(), fix incorrect error handling for a call to iov_iter_extract_pages(). A case is missing for when iov_iter_extract_pages() only got some pages and return a number larger than 0, but not the requested amount.

This fixes a possible NULL pointer dereference following a bad input from ioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-40031",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "lessThan": "9338093db954918558677a468d32e77041c65167",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "lessThan": "6a7874ab814ce12003c46a92f7afc9b035c8e8e9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "lessThan": "d5cf5b37064b1699d946e8b7ab4ac7d7d101814c",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/tee/tee_shm.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.8",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/tee/tee_shm.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-28T12:15:36.890",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/6a7874ab814ce12003c46a92f7afc9b035c8e8e9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9338093db954918558677a468d32e77041c65167",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: fix register_shm_helper()\n\nIn register_shm_helper(), fix incorrect error handling for a call to\niov_iter_extract_pages(). A case is missing for when\niov_iter_extract_pages() only got some pages and return a number larger\nthan 0, but not the requested amount.\n\nThis fixes a possible NULL pointer dereference following a bad input from\nioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped."
    }
  ],
  "lastModified": "2026-06-17T09:21:09.070",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}