{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-71311",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-27T12:23:27.414Z",
        "datePublished": "2026-05-27T12:24:02.532Z",
        "dateUpdated": "2026-08-05T12:12:45.568Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:12:45.568Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Initialize new folios before use\n\nKMSAN reports an uninitialized value in longest_match_std(), invoked\nfrom ntfs_compress_write(). When new folios are allocated without being\nmarked uptodate and ni_read_frame() is skipped because the caller expects\nthe frame to be completely overwritten, some reserved folios may remain\nonly partially filled, leaving the rest memory uninitialized."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - A remote SMB or NFS client can reach ntfs3's write path when a compressed NTFS volume is exported by ksmbd or nfsd. Writable NTFS-backed network shares are a reasonable NAS/server deployment.\nAC:L - No race is required; the attacker controls the write offset and length and can reliably end a write inside a newly allocated compression frame.\nPR:N - ksmbd supports anonymous guest-writable shares, including compressed directories whose new files inherit compression, so exploitation can require no credentials.\nUI:N - Once the share and filesystem are available, the attacker can perform the write, EOF extension, and read without victim interaction.\nS:U - The disclosure and limited data corruption remain within the host kernel and its filesystem security authority.\nC:H - Unfilled portions of an 8–64 KiB frame contain stale allocator data but are compressed, persisted, and marked uptodate. Extending EOF and reading can expose substantial kernel or cross-process memory, and the process can be repeated.\nI:L - Uninitialized bytes can become file contents instead of the required zero-filled extension, causing limited and value-uncontrolled data modification. The bug does not provide an arbitrary kernel write or control-flow primitive.\nA:N - The compression code keeps pointers, indexes, and output sizes bounded, so the uninitialized values do not crash a normal kernel. A KMSAN diagnostic on specially instrumented kernels is not a production availability impact."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ntfs3/file.c"
                    ],
                    "versions": [
                        {
                            "version": "584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2",
                            "lessThan": "dd6c81527d097b3b0bf5a15c2fdc9657d045144c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2",
                            "lessThan": "5a30cc03bde169ad558695b26da6ea7e55f6194a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2",
                            "lessThan": "41d79f8e2a36622d148719bf7c18b46ac1264284",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "584f60ba22f79c89e6708ab82a5b5d9b8fa21fb2",
                            "lessThan": "f223ebffa185cc8da934333c5a31ff2d4f992dc9",
                            "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/ntfs3/file.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.75",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.14",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.4",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.11",
                                    "versionEndExcluding": "6.12.75"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.18.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.19.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/dd6c81527d097b3b0bf5a15c2fdc9657d045144c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5a30cc03bde169ad558695b26da6ea7e55f6194a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/41d79f8e2a36622d148719bf7c18b46ac1264284"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f223ebffa185cc8da934333c5a31ff2d4f992dc9"
                }
            ],
            "title": "fs/ntfs3: Initialize new folios before use",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}