{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40103",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.164Z",
        "datePublished": "2025-10-30T09:48:08.421Z",
        "dateUpdated": "2026-05-11T21:42:34.498Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:42:34.498Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix refcount leak for cifs_sb_tlink\n\nFix three refcount inconsistency issues related to `cifs_sb_tlink`.\n\nComments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be\ncalled after successful calls to `cifs_sb_tlink()`. Three calls fail to\nupdate refcount accordingly, leading to possible resource leaks."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/inode.c",
                        "fs/smb/client/smb2ops.c"
                    ],
                    "versions": [
                        {
                            "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
                            "lessThan": "d3c8ea197055c260119a13360e8202a27e53e1e4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
                            "lessThan": "790282abe9d805f08618c1c24ea2529e7259b692",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
                            "lessThan": "d7dd034c14928306db1b46be277ae439b84dacf9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
                            "lessThan": "e15605b68b490186da2ad8029c0351a9cfb0b9af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
                            "lessThan": "896bb31e1416f582503db1350cf1bd10dc64e5a6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
                            "lessThan": "c2b77f42205ef485a647f62082c442c1cd69d3fc",
                            "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/inode.c",
                        "fs/smb/client/smb2ops.c"
                    ],
                    "versions": [
                        {
                            "version": "3.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.158",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.114",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.55",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.5",
                            "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": "3.7",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.1.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.6.114"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.12.55"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.17.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af"
                },
                {
                    "url": "https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc"
                }
            ],
            "title": "smb: client: Fix refcount leak for cifs_sb_tlink",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}