{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43055",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.980Z",
        "datePublished": "2026-05-01T14:15:48.139Z",
        "dateUpdated": "2026-08-05T12:25:36.045Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:25:36.045Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: file: Use kzalloc_flex for aio_cmd\n\nThe target_core_file doesn't initialize the aio_cmd->iocb for the\nki_write_stream. When a write command fd_execute_rw_aio() is executed,\nwe may get a bogus ki_write_stream value, causing unintended write\nfailure status when checking iocb->ki_write_stream > max_write_streams\nin the block device.\n\nLet's just use kzalloc_flex when allocating the aio_cmd and let\nki_write_stream=0 to fix this issue."
                }
            ],
            "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"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - The vulnerable FILEIO backend can be reached through network SCSI target fabrics, especially the in-kernel iSCSI target over TCP, by sending SCSI WRITE commands to an exported fileio LUN.\nAC:L - In an affected deployment with fileio async I/O enabled, triggering only requires ordinary WRITE CDB/DataOUT traffic; there is no race or attacker-uncontrolled timing condition.\nPR:N - iSCSI target supports no-auth/dynamic-ACL deployments, and in that reasonable worst-case a remote initiator can log in and issue writes without credentials.\nUI:N - No victim user action is needed after the target is configured and listening; the attacker sends protocol commands directly.\nS:U - The impact remains within the kernel target/storage service authority and does not cross a VM, IOMMU, or separate security boundary.\nC:N - The uninitialized field is a write-stream selector byte used internally and is not returned to the attacker or used as a memory read primitive.\nI:N - The bug causes bogus stream selection or write rejection, but it does not provide unauthorized modification of kernel memory or logical storage contents.\nA:H - A stale nonzero stream value can make valid block-device writes fail with CHECK CONDITION, and a remote initiator can repeatedly trigger write failure against the exported LUN."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/target/target_core_file.c"
                    ],
                    "versions": [
                        {
                            "version": "732f25a2895a8c1c54fb56544f0b1e23770ef4d7",
                            "lessThan": "ce54802fe6bb78eb0feffc66fed6a45d41ffc3ab",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "732f25a2895a8c1c54fb56544f0b1e23770ef4d7",
                            "lessThan": "4eaff1728d0e69b95933412241bbccf4f797dba8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "732f25a2895a8c1c54fb56544f0b1e23770ef4d7",
                            "lessThan": "01f784fc9d0ab2a6dac45ee443620e517cb2a19b",
                            "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/target/target_core_file.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.22",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.12",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.18.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "6.19.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ce54802fe6bb78eb0feffc66fed6a45d41ffc3ab"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4eaff1728d0e69b95933412241bbccf4f797dba8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/01f784fc9d0ab2a6dac45ee443620e517cb2a19b"
                }
            ],
            "title": "scsi: target: file: Use kzalloc_flex for aio_cmd",
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}