{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90185",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.791Z",
        "datePublished": "2026-09-17T16:07:08.392Z",
        "dateUpdated": "2026-10-19T08:59:22.077Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:59:22.077Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: serialize configfs attribute stores with the lock\n\nThe NULLB_DEVICE_ATTR _store takes no lock: apply_fn attributes\n(submit_queues, poll_queues) get dev->NAME written again after apply_fn\nreturns, outside its lock; APPLY=NULL attributes are entirely lockless.\nconfigfs only serializes stores per-open-file, so concurrent stores on\nseparate fds race.\n\nFor apply_fn attributes, once one store's apply_fn has reconfigured the\nhardware, a second (losing) store can still overwrite dev->NAME\nafterwards. This leaves dev->submit_queues out of sync with the live\nqueue count, which is later caught by the WARN_ON_ONCE() in\nnull_map_queues().\n\nFor !apply_fn attributes, power_store()'s null_add_dev() validates and\nbuilds the device under \"lock\" but only sets CONFIGURED afterwards. A store\nslipping in during this window can change a field mid-setup -- for example,\nzone_nr_conv can be pushed above nr_zones after it has already been\nclamped, leading to an out-of-bounds dev->zones[] access.\n\nTake \"lock\" in the macro around the apply_fn call, the CONFIGURED test and\nthe field write, and move it out of nullb_apply_submit_queues()/\nnullb_apply_poll_queues() so both paths are covered once. This serializes\nstores with power_store's setup and with each other."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/block/null_blk/main.c"
                    ],
                    "versions": [
                        {
                            "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                            "lessThan": "8e839ed5210399a0330a8a6c5885c1d40a537c6d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                            "lessThan": "88d806d0e1d36246208386a8e55b511c1b3d647c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                            "lessThan": "3945ce8cbce4e328e6fdf0b522dc71e340de19db",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                            "lessThan": "65cae82fd3c39b53430672cb9e3ecd267471a6ce",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                            "lessThan": "c70994c2862b05e44728912b2ea9487d31e2aea7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "45919fbfe1c487c17ea1d198534339a5e8abeae3",
                            "lessThan": "7e7fff51808237703a3a1df6dd5cae1dfd1db86d",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/block/null_blk/main.c"
                    ],
                    "versions": [
                        {
                            "version": "5.5",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "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": "5.5",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8e839ed5210399a0330a8a6c5885c1d40a537c6d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/88d806d0e1d36246208386a8e55b511c1b3d647c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3945ce8cbce4e328e6fdf0b522dc71e340de19db"
                },
                {
                    "url": "https://git.kernel.org/stable/c/65cae82fd3c39b53430672cb9e3ecd267471a6ce"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c70994c2862b05e44728912b2ea9487d31e2aea7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7e7fff51808237703a3a1df6dd5cae1dfd1db86d"
                }
            ],
            "title": "null_blk: serialize configfs attribute stores with the lock",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}