{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40179",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.177Z",
        "datePublished": "2025-11-12T21:56:24.882Z",
        "dateUpdated": "2026-05-11T21:44:17.422Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:44:17.422Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: verify orphan file size is not too big\n\nIn principle orphan file can be arbitrarily large. However orphan replay\nneeds to traverse it all and we also pin all its buffers in memory. Thus\nfilesystems with absurdly large orphan files can lead to big amounts of\nmemory consumed. Limit orphan file size to a sane value and also use\nkvmalloc() for allocating array of block descriptor structures to avoid\nlarge order allocations for sane but large orphan files."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/orphan.c"
                    ],
                    "versions": [
                        {
                            "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
                            "lessThan": "95a21611b14ae0a401720645245a8db16f040995",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
                            "lessThan": "566a1d6084563bd07433025aa23bcea4427de107",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
                            "lessThan": "304fc34ff6fc8261138fd81f119e024ac3a129e9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
                            "lessThan": "a2d803fab8a6c6a874277cb80156dc114db91921",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
                            "lessThan": "2b9da798ff0f4d026c5f0f815047393ebe7d8859",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
                            "lessThan": "0a6ce20c156442a4ce2a404747bb0fb05d54eeb3",
                            "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/ext4/orphan.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.195",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.157",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.113",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.54",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.4",
                            "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": "5.15",
                                    "versionEndExcluding": "5.15.195"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.1.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.6.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.12.54"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.17.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/95a21611b14ae0a401720645245a8db16f040995"
                },
                {
                    "url": "https://git.kernel.org/stable/c/566a1d6084563bd07433025aa23bcea4427de107"
                },
                {
                    "url": "https://git.kernel.org/stable/c/304fc34ff6fc8261138fd81f119e024ac3a129e9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a2d803fab8a6c6a874277cb80156dc114db91921"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2b9da798ff0f4d026c5f0f815047393ebe7d8859"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0a6ce20c156442a4ce2a404747bb0fb05d54eeb3"
                }
            ],
            "title": "ext4: verify orphan file size is not too big",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}