{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40031",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.153Z",
        "datePublished": "2025-10-28T11:48:13.644Z",
        "dateUpdated": "2026-05-11T21:41:08.887Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:41:08.887Z"
            },
            "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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tee/tee_shm.c"
                    ],
                    "versions": [
                        {
                            "version": "7bdee41575919773818e525ea19e54eb817770af",
                            "lessThan": "9338093db954918558677a468d32e77041c65167",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7bdee41575919773818e525ea19e54eb817770af",
                            "lessThan": "6a7874ab814ce12003c46a92f7afc9b035c8e8e9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7bdee41575919773818e525ea19e54eb817770af",
                            "lessThan": "d5cf5b37064b1699d946e8b7ab4ac7d7d101814c",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tee/tee_shm.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.53",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.3",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "6.12.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "6.17.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9338093db954918558677a468d32e77041c65167"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6a7874ab814ce12003c46a92f7afc9b035c8e8e9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c"
                }
            ],
            "title": "tee: fix register_shm_helper()",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}