{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43427",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.009Z",
        "datePublished": "2026-05-08T14:22:00.345Z",
        "dateUpdated": "2026-05-11T22:24:22.781Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:24:22.781Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: class: cdc-wdm: fix reordering issue in read code path\n\nQuoting the bug report:\n\nDue to compiler optimization or CPU out-of-order execution, the\ndesc->length update can be reordered before the memmove. If this\nhappens, wdm_read() can see the new length and call copy_to_user() on\nuninitialized memory. This also violates LKMM data race rules [1].\n\nFix it by using WRITE_ONCE and memory barriers."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/class/cdc-wdm.c"
                    ],
                    "versions": [
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "638328ca9c17ae6511ad62198c57bae32ffa3c91",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "170e8daca24da6edb4be82ab01abf44e87af387b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "c8fa96ed021923dae147bcd9f9205b8df7b82360",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "4ee3062bf2c9a722afef429826e8607eaf3fc6a0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "276aef0fd2b92f41b920ac891c72cadeee957934",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "67ed312124bb1b61858778ac0b985b48961c862a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "e3c874b05901dc519054b5107d16620e6d2b5fea",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afba937e540c902c989cd516fd97ea0c8499bb27",
                            "lessThan": "8df672bfe3ec2268c2636584202755898e547173",
                            "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/usb/class/cdc-wdm.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.26",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.26",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.78",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.19",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.9",
                            "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": "2.6.26",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.12.78"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.18.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.19.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91"
                },
                {
                    "url": "https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173"
                }
            ],
            "title": "usb: class: cdc-wdm: fix reordering issue in read code path",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}