CVE-2025-40031

Full vulnerability record from the local CVENow database.

Description

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Deferred

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2025-10-28 12:15:36.890000

Last modified

2026-10-19 21:10:00.160000

View original CVE JSON

{
  "id": "CVE-2025-40031",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-10-28T12:15:36.890",
  "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\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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntee: Corrige register_shm_helper()\n\nEn register_shm_helper(), corrige el manejo de errores incorrecto para una llamada a iov_iter_extract_pages(). Falta un caso para cuando iov_iter_extract_pages() solo obtuvo algunas páginas y devuelve un número mayor que 0, pero no la cantidad solicitada.\n\nEsto corrige una posible desreferencia de puntero NULL después de una entrada incorrecta de ioctl(TEE_IOC_SHM_REGISTER) donde partes del búfer no están mapeadas."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/tee/tee_shm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "lessThan": "9338093db954918558677a468d32e77041c65167",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "lessThan": "6a7874ab814ce12003c46a92f7afc9b035c8e8e9",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "lessThan": "d5cf5b37064b1699d946e8b7ab4ac7d7d101814c",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/tee/tee_shm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.8",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.8",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.53",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.3",
              "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/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"
    }
  ]
}