{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-52960",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.373Z",
        "datePublished": "2026-06-24T16:28:41.044Z",
        "dateUpdated": "2026-08-05T12:32:10.671Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:32:10.671Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: put folios not suitable for writeback\n\nThe batch holds references to the folios (see `filemap_get_folios`,\n`folio_batch_release`), so we need to `folio_put` the folios we remove.\n\nTested on v6.18."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - Direct reachability is through CephFS file writeback, and a writable CephFS tree can reasonably be exposed through kernel network fileservers such as nfsd/ksmbd, which drive the same VFS writeback path remotely.\nAC:L - The bug is a deterministic missing folio_put() on skipped writeback folios; an attacker can repeatedly create/write/delete/sync files to accumulate leaked references without needing an uncontrollable race.\nPR:N - In the network-export scenario, the attacker needs no local privileges on the vulnerable host, and writable anonymous or guest-style exports are a reasonable high-severity deployment.\nUI:N - Once the CephFS mount/export exists, exploitation only requires attacker-driven writes and writeback triggers; no victim user action is needed.\nS:U - The impact remains within the vulnerable kernel host and does not cross a separate security authority such as a guest-to-host or IOMMU boundary.\nC:N - The flaw leaks folio references and pins page-cache memory; it does not provide an information disclosure or arbitrary read primitive.\nI:N - The flaw does not corrupt memory or allow unauthorized data modification; it only prevents selected folios from being released.\nA:H - Repeated triggering can leave folios permanently unreclaimable even after unmount/drop_caches, causing severe memory pressure, swapping, allocation failures, and potential system-wide DoS."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ceph/addr.c"
                    ],
                    "versions": [
                        {
                            "version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
                            "lessThan": "86921e890fe1dea9791fb70bec552516fd47716a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
                            "lessThan": "544576f0f05c4a759806acddfaaeb686f14fb4b0",
                            "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/ceph/addr.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "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": "6.15",
                                    "versionEndExcluding": "7.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0"
                }
            ],
            "title": "ceph: put folios not suitable for writeback",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}