{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53027",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.379Z",
        "datePublished": "2026-06-24T16:29:35.740Z",
        "dateUpdated": "2026-07-24T14:33:47.674Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-24T14:33:47.674Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()\n\nWhen a compressed or sparse attribute has its clusters frame-aligned,\nvcn is rounded down to the frame start using cmask, which can result\nin vcn != vcn0. In this case, vcn and vcn0 may reside in different\nattribute segments.\n\nThe code already handles the case where vcn is in a different segment\nby loading its runs before allocation. However, it fails to load runs\nfor vcn0 when vcn0 resides in a different segment than vcn. This causes\nrun_lookup_entry() to return SPARSE_LCN for vcn0 since its segment was\nnever loaded into the in-memory run list, triggering the WARN_ON(1).\n\nFix this by adding a missing check for vcn0 after the existing vcn\nsegment check. If vcn0 falls outside the current segment range\n[svcn, evcn1), find and load the attribute segment containing vcn0\nbefore performing the run lookup.\n\nThe following scenario triggers the bug:\n  attr_data_get_block_locked()\n    vcn = vcn0 & cmask        <- vcn != vcn0 after frame alignment\n    load runs for vcn segment <- vcn0 segment not loaded!\n    attr_allocate_clusters()  <- allocation succeeds\n    run_lookup_entry(vcn0)    <- vcn0 not in run -> SPARSE_LCN\n    WARN_ON(1)                <- bug fires here!"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ntfs3/attrib.c"
                    ],
                    "versions": [
                        {
                            "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
                            "lessThan": "ea59d9dbc5504e29d420ac4aab774cbce39b0e69",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
                            "lessThan": "d68a14450783ecc5fddae957ac4e1c546dfcfb73",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
                            "lessThan": "08fad5d5a26cc55c0ecb68ac59ba3be5e31f4147",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
                            "lessThan": "2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
                            "lessThan": "d7ea8495fd307b58f8867acd81a1b40075b1d3ba",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "406a037d93b769bca248476bd14bbe548dc1ec35",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.1.132",
                            "lessThan": "6.2",
                            "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/ntfs3/attrib.c"
                    ],
                    "versions": [
                        {
                            "version": "6.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.96",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.39",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.10",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "6.2",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
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                                },
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                                    "versionStartIncluding": "6.1.132"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ea59d9dbc5504e29d420ac4aab774cbce39b0e69"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d68a14450783ecc5fddae957ac4e1c546dfcfb73"
                },
                {
                    "url": "https://git.kernel.org/stable/c/08fad5d5a26cc55c0ecb68ac59ba3be5e31f4147"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d7ea8495fd307b58f8867acd81a1b40075b1d3ba"
                }
            ],
            "title": "fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()",
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