{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97433",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-24T14:53:16.869Z",
        "datePublished": "2026-09-24T16:03:46.169Z",
        "dateUpdated": "2026-09-25T12:44:10.016Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-09-25T12:44:10.016Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: validate FDP configuration descriptor sizes\n\nValidate descriptor sizes while walking the FDP configurations log so\ndsze == 0 or a descriptor past the log end cannot cause unbounded\niteration or reads past the buffer."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - nvme_query_fdp_granularity() walks nvme_fdp_config_desc.dsze from the Get Log Page LID 0x20 (NVME_LOG_FDP_CONFIGS) buffer filled by nvme_get_log_lsi(); on nvme-tcp that payload is C2HData copied by nvme_tcp_recv_data() from the remote NVMe-oF target (TCP 4420), so the malformed descriptor sizes arrive on the wire.\nAC:L - The peer sets Identify ctratt NVME_CTRL_ATTR_FDPS, Get Features FID 0x1d (FDPE and fdpcidx), and log fields sze/dsze, so nvme_query_fdp_granularity() can skip with a crafted dsze to park desc just below end and then load nrg/runs past the kvmalloc object with no race.\nPR:N - The attacker is the NVMe-oF controller. nvme_scan_work() submits that Get Log Page on the existing admin_q; DH-HMAC-CHAP and TLS are optional, and no host uid, capability, or /dev/nvme-fabrics write is required once the session exists.\nUI:N - nvme_start_ctrl() queues ctrl->scan_work and nvme_handle_aen_notice() requeues it on NVME_AER_NOTICE_NS_CHANGED, so nvme_scan_ns()->nvme_update_ns_info_block()->nvme_query_fdp_info()->nvme_query_fdp_granularity() runs on nvme_wq without a further victim mount or click.\nS:U - The over-read is of the host kvmalloc FDP configs log and the info->runs store inside nvme_query_fdp_granularity(); it does not cross a KVM/Xen, IOMMU, or other distinct security authority.\nC:L - After the dsze walk, nvme_query_fdp_granularity() only does le32_to_cpu(desc->nrg) and le64_to_cpu(desc->runs) (offsets 4 and 16). With desc at end-1 that is a strictly bounded 12-byte load past the log object, a small heap leak rather than an arbitrary read.\nI:N - Those fields are stored to info->runs and min()'d into write_stream_granularity in nvme_update_ns_info_block(); the dsze walk performs no out-of-bounds write, use-after-free, or control-flow hijack.\nA:H - hdr.sze is attacker-chosen (capped at PAGE_SIZE*MAX_ORDER_NR_PAGES) for kvmalloc(), and desc->nrg/desc->runs are then loaded without ensuring the selected descriptor fits; that over-read past the allocation can oops when the walk parks desc at the buffer end."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/host/core.c"
                    ],
                    "versions": [
                        {
                            "version": "30b5f20bb2ddab013035399e5c7e6577da49320a",
                            "lessThan": "97efd7a41aac08b43ea2337c5913a2bc75484f9f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30b5f20bb2ddab013035399e5c7e6577da49320a",
                            "lessThan": "0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8",
                            "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/nvme/host/core.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.16",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/97efd7a41aac08b43ea2337c5913a2bc75484f9f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8"
                }
            ],
            "title": "nvme: validate FDP configuration descriptor sizes",
            "x_generator": {
                "engine": "bippy-1.2.0"
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}