{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68786",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T10:30:51.036Z",
        "datePublished": "2026-01-13T15:28:59.578Z",
        "dateUpdated": "2026-05-11T21:53:19.839Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:53:19.839Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: skip lock-range check on equal size to avoid size==0 underflow\n\nWhen size equals the current i_size (including 0), the code used to call\ncheck_lock_range(filp, i_size, size - 1, WRITE), which computes `size - 1`\nand can underflow for size==0. Skip the equal case."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/vfs.c"
                    ],
                    "versions": [
                        {
                            "version": "f44158485826c076335d6860d35872271a83791d",
                            "lessThan": "52fcbb92e0d3acfd1448b2a43b6595d540da5295",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f44158485826c076335d6860d35872271a83791d",
                            "lessThan": "da29cd197246c85c0473259f1cad897d9d28faea",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f44158485826c076335d6860d35872271a83791d",
                            "lessThan": "a6f4cfa3783804336491e0edcb250c25f9b59d33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f44158485826c076335d6860d35872271a83791d",
                            "lessThan": "571204e4758a528fbd67330bd4b0dfbdafb33dd8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f44158485826c076335d6860d35872271a83791d",
                            "lessThan": "5d510ac31626ed157d2182149559430350cf2104",
                            "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/smb/server/vfs.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.160",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.120",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.64",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.3",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "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": "6.1.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.6.120"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.12.64"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.18.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295"
                },
                {
                    "url": "https://git.kernel.org/stable/c/da29cd197246c85c0473259f1cad897d9d28faea"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a6f4cfa3783804336491e0edcb250c25f9b59d33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104"
                }
            ],
            "title": "ksmbd: skip lock-range check on equal size to avoid size==0 underflow",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}