FKIE_CVE-2025-40031

Vulnerability from fkie_nvd - Published: 2025-10-28 12:15 - Updated: 2026-06-17 09:21
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a7874ab814ce12003c46a92f7afc9b035c8e8e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9338093db954918558677a468d32e77041c65167
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tee/tee_shm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9338093db954918558677a468d32e77041c65167",
              "status": "affected",
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "versionType": "git"
            },
            {
              "lessThan": "6a7874ab814ce12003c46a92f7afc9b035c8e8e9",
              "status": "affected",
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "versionType": "git"
            },
            {
              "lessThan": "d5cf5b37064b1699d946e8b7ab4ac7d7d101814c",
              "status": "affected",
              "version": "7bdee41575919773818e525ea19e54eb817770af",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tee/tee_shm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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\u0027t mapped."
    }
  ],
  "id": "CVE-2025-40031",
  "lastModified": "2026-06-17T09:21:09.070",
  "metrics": {},
  "published": "2025-10-28T12:15:36.890",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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