{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-21691",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-12-29T08:45:45.742Z",
        "datePublished": "2025-02-10T15:58:47.219Z",
        "dateUpdated": "2026-05-11T21:04:33.709Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:04:33.709Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachestat: fix page cache statistics permission checking\n\nWhen the 'cachestat()' system call was added in commit cf264e1329fb\n(\"cachestat: implement cachestat syscall\"), it was meant to be a much\nmore convenient (and performant) version of mincore() that didn't need\nmapping things into the user virtual address space in order to work.\n\nBut it ended up missing the \"check for writability or ownership\" fix for\nmincore(), done in commit 134fca9063ad (\"mm/mincore.c: make mincore()\nmore conservative\").\n\nThis just adds equivalent logic to 'cachestat()', modified for the file\ncontext (rather than vma)."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/filemap.c"
                    ],
                    "versions": [
                        {
                            "version": "cf264e1329fb0307e044f7675849f9f38b44c11a",
                            "lessThan": "7d6405c13b0d8a8367cd8df63f118b619a3f0dd2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cf264e1329fb0307e044f7675849f9f38b44c11a",
                            "lessThan": "780ab8329672464984cf1344bd5c3993af0226c7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cf264e1329fb0307e044f7675849f9f38b44c11a",
                            "lessThan": "97153a05077f618f7471f50a78158602badccb30",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "cf264e1329fb0307e044f7675849f9f38b44c11a",
                            "lessThan": "5f537664e705b0bf8b7e329861f20128534f6a83",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/filemap.c"
                    ],
                    "versions": [
                        {
                            "version": "6.5",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.75",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.12",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.13.1",
                            "lessThanOrEqual": "6.13.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14",
                            "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": "6.5",
                                    "versionEndExcluding": "6.6.75"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.12.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.13.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.14"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7d6405c13b0d8a8367cd8df63f118b619a3f0dd2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/780ab8329672464984cf1344bd5c3993af0226c7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/97153a05077f618f7471f50a78158602badccb30"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5f537664e705b0bf8b7e329861f20128534f6a83"
                }
            ],
            "title": "cachestat: fix page cache statistics permission checking",
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                "engine": "bippy-1.2.0"
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        }
    }
}