{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-46105",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.097Z",
        "datePublished": "2026-05-28T09:35:09.126Z",
        "dateUpdated": "2026-08-05T12:29:39.746Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:29:39.746Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: mpt3sas: Limit NVMe request size to 2 MiB\n\nThe HBA firmware reports NVMe MDTS values based on the underlying drive\ncapability. However, because the driver allocates a fixed 4K buffer for\nthe PRP list, accommodating at most 512 entries, the driver supports a\nmaximum I/O transfer size of 2 MiB.\n\nLimit max_hw_sectors to the smaller of the reported MDTS and the 2 MiB\ndriver limit to prevent issuing oversized I/O that may lead to a kernel\noops."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable code is a SCSI/NVMe storage HBA driver with no network exposure; the overflow is reached by issuing block I/O to an NVMe device behind the controller, requiring local access to the affected system.\nAC:L - On an affected configuration (an NVMe drive reporting MDTS > 2 MiB behind the HBA), the uncapped max_hw_sectors lets a single >2 MiB I/O reach the driver, so the attacker reliably overflows the fixed 512-entry PRP buffer with no race or uncontrolled condition.\nPR:L - An ordinary unprivileged local user with read/write access to a file or block device on the NVMe drive can issue a large O_DIRECT request that the block layer submits as one oversized I/O; no root or special capability is needed.\nUI:N - The attacker triggers the overflow directly by submitting their own large I/O; no action by another user is required.\nS:U - The corruption is confined to kernel memory within the same security authority; there is no VM/IOMMU/sandbox boundary crossing.\nC:H - The out-of-bounds write corrupts the contiguous DMA pool holding PRP descriptors for other in-flight commands, and such memory corruption of DMA address lists can be leveraged to misdirect DMA and disclose memory contents.\nI:H - This is an out-of-bounds/heap write past the fixed PRP DMA buffer, corrupting adjacent kernel DMA-pool memory with attacker-influenced (page-address) data — classic memory-corruption integrity impact.\nA:H - Overrunning the fixed PRP buffer corrupts kernel memory and leads to a kernel oops/panic, as documented in the fix (\"may lead to a kernel oops\")."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/scsi/mpt3sas/mpt3sas_scsih.c"
                    ],
                    "versions": [
                        {
                            "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
                            "lessThan": "45dcc815fc5539e88154315f36cbcb11d3a52fc2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
                            "lessThan": "e5f9824817c6358b9f9738bdb92dec9e4e794d3c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b",
                            "lessThan": "04631f55afc543d5431a2bdee7f6cc0f2c0debe7",
                            "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/scsi/mpt3sas/mpt3sas_scsih.c"
                    ],
                    "versions": [
                        {
                            "version": "6.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.30",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.7",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "6.17",
                                    "versionEndExcluding": "6.18.30"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.0.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/45dcc815fc5539e88154315f36cbcb11d3a52fc2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e5f9824817c6358b9f9738bdb92dec9e4e794d3c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/04631f55afc543d5431a2bdee7f6cc0f2c0debe7"
                }
            ],
            "title": "scsi: mpt3sas: Limit NVMe request size to 2 MiB",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}