{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40125",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.169Z",
        "datePublished": "2025-11-12T10:23:20.180Z",
        "dateUpdated": "2026-05-11T21:43:15.313Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:43:15.313Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx\n\nIn __blk_mq_update_nr_hw_queues() the return value of\nblk_mq_sysfs_register_hctxs() is not checked. If sysfs creation for hctx\nfails, later changing the number of hw_queues or removing disk will\ntrigger the following warning:\n\n  kernfs: can not remove 'nr_tags', no directory\n  WARNING: CPU: 2 PID: 637 at fs/kernfs/dir.c:1707 kernfs_remove_by_name_ns+0x13f/0x160\n  Call Trace:\n   remove_files.isra.1+0x38/0xb0\n   sysfs_remove_group+0x4d/0x100\n   sysfs_remove_groups+0x31/0x60\n   __kobject_del+0x23/0xf0\n   kobject_del+0x17/0x40\n   blk_mq_unregister_hctx+0x5d/0x80\n   blk_mq_sysfs_unregister_hctxs+0x94/0xd0\n   blk_mq_update_nr_hw_queues+0x124/0x760\n   nullb_update_nr_hw_queues+0x71/0xf0 [null_blk]\n   nullb_device_submit_queues_store+0x92/0x120 [null_blk]\n\nkobjct_del() was called unconditionally even if sysfs creation failed.\nFix it by checkig the kobject creation statusbefore deleting it."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-mq-sysfs.c"
                    ],
                    "versions": [
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "a8c53553f1833cc2d14175d2d72cf37193a01898",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "cc14ea21c4e658814d737ed4dedde6cd626a15ad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "4b97e99b87a773d52699521d40864f3ec888e9a6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "6e7dadc5763c48eb3b9b91265a21f312599ebb2c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "06c4826b1d900611096e4621e93133db57e13911",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "babc634e9fe2803962dba98a07587e835dbc0731",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "d5ddd76ee52bdc16e9f8b1e7791291e785dab032",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
                            "lessThan": "4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/blk-mq-sysfs.c"
                    ],
                    "versions": [
                        {
                            "version": "4.20",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.20",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.301",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.246",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.195",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.156",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.112",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.53",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.3",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "4.20",
                                    "versionEndExcluding": "5.4.301"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "5.10.246"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "5.15.195"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.1.156"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.6.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.12.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.17.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a8c53553f1833cc2d14175d2d72cf37193a01898"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cc14ea21c4e658814d737ed4dedde6cd626a15ad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4b97e99b87a773d52699521d40864f3ec888e9a6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6e7dadc5763c48eb3b9b91265a21f312599ebb2c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/06c4826b1d900611096e4621e93133db57e13911"
                },
                {
                    "url": "https://git.kernel.org/stable/c/babc634e9fe2803962dba98a07587e835dbc0731"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d5ddd76ee52bdc16e9f8b1e7791291e785dab032"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed"
                }
            ],
            "title": "blk-mq: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}