{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93785",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-18T17:59:28.788Z",
        "datePublished": "2026-09-24T16:02:18.964Z",
        "dateUpdated": "2026-10-03T10:57:20.267Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-03T10:57:20.267Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key->datalen, which\nis limited to U16_MAX.  Accepting a larger key payload truncates the\nrecorded length and can make later users interpret the payload using\ninconsistent bounds.\n\nReject oversized preparsed payloads before allocating or copying them.\nThis keeps key->datalen consistent with the stored data for both inline\nand separately allocated idmap payloads."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/cifsacl.c"
                    ],
                    "versions": [
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "eeac976b74b4f697cfc517187b7cbfd72652dbbc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "125b05ac8ca8758950e4369c1542d57a162f504c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "945f6cde6bcf8f08f6fa5df8882b1b9582e55efa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "3a4a34a732e8a08309eed0a74314dbd9f2f1c972",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "6cfeef221ac00d63c07f6122f58e6159bde69ca0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "8b12f65d7caf16d124098cb4895a203367d35b57",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e",
                            "lessThan": "455488cd5054bcc59db40fa1cc2c004031a5b2a5",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/cifsacl.c"
                    ],
                    "versions": [
                        {
                            "version": "3.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "3.2",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.2",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/eeac976b74b4f697cfc517187b7cbfd72652dbbc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/125b05ac8ca8758950e4369c1542d57a162f504c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/945f6cde6bcf8f08f6fa5df8882b1b9582e55efa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3a4a34a732e8a08309eed0a74314dbd9f2f1c972"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57"
                },
                {
                    "url": "https://git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5"
                }
            ],
            "title": "cifs: validate idmap key payload length",
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    }
}