CVE-2025-40031 (GCVE-0-2025-40031)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2025-12-01 06:16
VLAI?
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7bdee41575919773818e525ea19e54eb817770af , < 9338093db954918558677a468d32e77041c65167 (git)
Affected: 7bdee41575919773818e525ea19e54eb817770af , < 6a7874ab814ce12003c46a92f7afc9b035c8e8e9 (git)
Affected: 7bdee41575919773818e525ea19e54eb817770af , < d5cf5b37064b1699d946e8b7ab4ac7d7d101814c (git)
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    Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.53 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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          "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."
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        "dateUpdated": "2025-12-01T06:16:34.067Z",
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        "shortName": "Linux"
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    "cveId": "CVE-2025-40031",
    "datePublished": "2025-10-28T11:48:13.644Z",
    "dateReserved": "2025-04-16T07:20:57.153Z",
    "dateUpdated": "2025-12-01T06:16:34.067Z",
    "state": "PUBLISHED"
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.