{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90155",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.790Z",
        "datePublished": "2026-09-17T16:06:47.716Z",
        "dateUpdated": "2026-10-21T12:50:11.046Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:50:11.046Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: detach blocked lock requests before freeing\n\nA file_lock retained by ksmbd for byte-range lock bookkeeping can still\nbe part of the VFS blocked-request graph. In particular, the VFS can\nchain a new waiter below an already blocked request through\nflc_blocked_requests. The ksmbd_file reference count does not cover that\ngraph.\n\nBoth __ksmbd_close_fd() and the cross-request unlock path free these\nretained file_lock objects directly. If a dependent waiter is still\nattached, locks_release_private() hits\nBUG_ON(!list_empty(&flc->flc_blocked_requests)). The same lifetime\nmismatch can leave a freed ksmbd_lock reachable through its request-local\nllist.\n\nDetach the file_lock from the blocked-request graph before freeing it in\nthe close, cross-request unlock, and rollback paths. locks_delete_block()\nalso wakes requests chained below the object. Remove llist when a\ncompleted lock is published so a globally visible ksmbd_lock no longer\npoints into the submitting worker's stack."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/smb2pdu.c",
                        "fs/smb/server/vfs_cache.c"
                    ],
                    "versions": [
                        {
                            "version": "d63528eb0d43c4796c42aad56889dec12cf4e122",
                            "lessThan": "d20d3f6ad8b0b6f4e1bb32cdf7eca251962e8f04",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d63528eb0d43c4796c42aad56889dec12cf4e122",
                            "lessThan": "d31db79cfaa9fce6649772ad279779473ba8aef9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d63528eb0d43c4796c42aad56889dec12cf4e122",
                            "lessThan": "f77d2accafca529e0ea3f979eb6e6cf1dac05c90",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d63528eb0d43c4796c42aad56889dec12cf4e122",
                            "lessThan": "514a0b2bc949963497e66cacd433f65dc768a71d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d63528eb0d43c4796c42aad56889dec12cf4e122",
                            "lessThan": "215e8816b1ac25176d911abb8704390413ccee4b",
                            "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/smb2pdu.c",
                        "fs/smb/server/vfs_cache.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.12.114"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d20d3f6ad8b0b6f4e1bb32cdf7eca251962e8f04"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d31db79cfaa9fce6649772ad279779473ba8aef9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f77d2accafca529e0ea3f979eb6e6cf1dac05c90"
                },
                {
                    "url": "https://git.kernel.org/stable/c/514a0b2bc949963497e66cacd433f65dc768a71d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/215e8816b1ac25176d911abb8704390413ccee4b"
                }
            ],
            "title": "ksmbd: detach blocked lock requests before freeing",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}