{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23148",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.975Z",
        "datePublished": "2026-02-14T16:01:17.575Z",
        "dateUpdated": "2026-05-23T16:03:59.219Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:03:59.219Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference\n\nThere is a race condition in nvmet_bio_done() that can cause a NULL\npointer dereference in blk_cgroup_bio_start():\n\n1. nvmet_bio_done() is called when a bio completes\n2. nvmet_req_complete() is called, which invokes req->ops->queue_response(req)\n3. The queue_response callback can re-queue and re-submit the same request\n4. The re-submission reuses the same inline_bio from nvmet_req\n5. Meanwhile, nvmet_req_bio_put() (called after nvmet_req_complete)\n   invokes bio_uninit() for inline_bio, which sets bio->bi_blkg to NULL\n6. The re-submitted bio enters submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() dereferences bio->bi_blkg, causing a crash:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000028\n  #PF: supervisor read access in kernel mode\n  RIP: 0010:blk_cgroup_bio_start+0x10/0xd0\n  Call Trace:\n   submit_bio_noacct_nocheck+0x44/0x250\n   nvmet_bdev_execute_rw+0x254/0x370 [nvmet]\n   process_one_work+0x193/0x3c0\n   worker_thread+0x281/0x3a0\n\nFix this by reordering nvmet_bio_done() to call nvmet_req_bio_put()\nBEFORE nvmet_req_complete(). This ensures the bio is cleaned up before\nthe request can be re-submitted, preventing the race condition."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/target/io-cmd-bdev.c"
                    ],
                    "versions": [
                        {
                            "version": "431e58d56fcb5ff1f9eb630724a922e0d2a941df",
                            "lessThan": "ee10b06980acca1d46e0fa36d6fb4a9578eab6e4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "190f4c2c863af7cc5bb354b70e0805f06419c038",
                            "lessThan": "68207ceefd71cc74ce4e983fa9bd10c3122e349b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "190f4c2c863af7cc5bb354b70e0805f06419c038",
                            "lessThan": "0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e2028fcf924d1c6df017033c8d6e28b735a0508",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.12.37",
                            "lessThan": "6.12.69",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.6",
                            "lessThan": "6.16",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/target/io-cmd-bdev.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.69",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.9",
                            "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": "6.12.37",
                                    "versionEndExcluding": "6.12.69"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "6.19"
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                                {
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ee10b06980acca1d46e0fa36d6fb4a9578eab6e4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/68207ceefd71cc74ce4e983fa9bd10c3122e349b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e"
                }
            ],
            "title": "nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}