{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23226",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.987Z",
        "datePublished": "2026-02-18T14:53:29.562Z",
        "dateUpdated": "2026-05-23T16:04:16.604Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:04:16.604Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: add chann_lock to protect ksmbd_chann_list xarray\n\nksmbd_chann_list xarray lacks synchronization, allowing use-after-free in\nmulti-channel sessions (between lookup_chann_list() and ksmbd_chann_del).\n\nAdds rw_semaphore chann_lock to struct ksmbd_session and protects\nall xa_load/xa_store/xa_erase accesses."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/mgmt/user_session.c",
                        "fs/smb/server/mgmt/user_session.h",
                        "fs/smb/server/smb2pdu.c"
                    ],
                    "versions": [
                        {
                            "version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
                            "lessThan": "4c2ca31608521895dd742a43beca4b4d29762345",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
                            "lessThan": "e4a8a96a93d08570e0405cfd989a8a07e5b6ff33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
                            "lessThan": "36ef605c0395b94b826a8c8d6f2697071173de6e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
                            "lessThan": "4f3a06cc57976cafa8c6f716646be6c79a99e485",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b1caecbf34b8c8260d851ec4efde71f3694460b7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "91bbf9cb2387a0d76322e9a343bc6bc160f66b3f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "853c416710b075153c1e1421e099ffbe5dac68ce",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.15.145",
                            "lessThan": "5.16",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.29",
                            "lessThan": "6.2",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.16",
                            "lessThan": "6.3",
                            "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/smb/server/mgmt/user_session.c",
                        "fs/smb/server/mgmt/user_session.h",
                        "fs/smb/server/smb2pdu.c"
                    ],
                    "versions": [
                        {
                            "version": "6.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.77",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.11",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.1",
                            "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": "6.3",
                                    "versionEndExcluding": "6.12.77"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.18.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.19.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "7.0"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.29"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2.16"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485"
                }
            ],
            "title": "ksmbd: add chann_lock to protect ksmbd_chann_list xarray",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}