{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97554",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-24T16:01:01.154Z",
        "datePublished": "2026-09-25T10:21:45.851Z",
        "dateUpdated": "2026-10-21T12:53:14.914Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:53:14.914Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: avoid using uninitialized SIDs in cifs_posix_to_fattr()\n\ncifs_posix_to_fattr() ignores the return value of posix_info_parse().\nWhen a malformed POSIX directory entry is encountered (e.g. invalid\nSID lengths from an untrusted server), posix_info_parse() returns -1\nwithout populating the 'parsed' struct.  The uninitialized stack\nmemory in parsed.owner and parsed.group is then passed to\nsid_to_id(), which processes the garbage bytes and passes them to\nrequest_key() to construct a SID string, potentially leaking kernel\nstack contents to the userspace idmap daemon.\n\nFix this by checking the return value and skipping the SID-to-id\nmapping when parsing fails.  The remaining fattr fields (timestamps,\nmode, etc.) are populated directly from the 'info' pointer so they\nare unaffected."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/readdir.c"
                    ],
                    "versions": [
                        {
                            "version": "9934430e2178d5164eb1ac91a9b092f9e7e64745",
                            "lessThan": "604feb3e8141bf11f5afd48d36d401fee5af9536",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9934430e2178d5164eb1ac91a9b092f9e7e64745",
                            "lessThan": "33106019c3be57b5fc6411cfaad6d98214a51265",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9934430e2178d5164eb1ac91a9b092f9e7e64745",
                            "lessThan": "2be31f252ade791b84f7164991f14436aed1d4b9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9934430e2178d5164eb1ac91a9b092f9e7e64745",
                            "lessThan": "c9a8b60ce140a68d172452f418137fc7ddbae7db",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9934430e2178d5164eb1ac91a9b092f9e7e64745",
                            "lessThan": "da6e25842431982d5a53cf00d925b98c690f4467",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dd80b98bdf0a4b3206739f3513b0518f27a7b4ef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d8e39c11f66125f49de55537a6efc8ecadf4a0f7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.8.17",
                            "lessThan": "5.9",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.9.2",
                            "lessThan": "5.10",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/readdir.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "5.10",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.12.114"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.8.17"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/604feb3e8141bf11f5afd48d36d401fee5af9536"
                },
                {
                    "url": "https://git.kernel.org/stable/c/33106019c3be57b5fc6411cfaad6d98214a51265"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2be31f252ade791b84f7164991f14436aed1d4b9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c9a8b60ce140a68d172452f418137fc7ddbae7db"
                },
                {
                    "url": "https://git.kernel.org/stable/c/da6e25842431982d5a53cf00d925b98c690f4467"
                }
            ],
            "title": "smb: client: avoid using uninitialized SIDs in cifs_posix_to_fattr()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}