{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63899",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T07:54:57.019Z",
        "datePublished": "2026-07-19T14:55:08.116Z",
        "dateUpdated": "2026-07-19T14:55:08.116Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-19T14:55:08.116Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: mxuport: fix memory corruption with small endpoint\n\nMake sure that the bulk-out endpoint max packet size is at least eight\nbytes to avoid user-controlled slab corruption should a malicious device\nreport a smaller size."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/usb/serial/mxuport.c"
                    ],
                    "versions": [
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "086b858b5f5125bc9d967ea2bd825f83d9f8f29d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "2f3661eb2446e1ef593da45e01a3b21a906768ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "ccbec56f2f9af008f1574335cc6a668f16603e47",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "be3a1ed4ae51fa8dde57383277d336ce834f2cd9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "e906545641d34fb1a09a65b4b5cfdff40eb09681",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "6c0cf56f00f280d72180bb6ce79741bc787a6269",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "b40166b4ef96067620a0f248e74ad9658c8f680c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e",
                            "lessThan": "4085f0dbb1ce2251c9a5938d693de6593f0ab2bd",
                            "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/serial/mxuport.c"
                    ],
                    "versions": [
                        {
                            "version": "3.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.93",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.35",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.12",
                            "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": "3.14",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "5.15.210"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.1.176"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.6.143"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.12.93"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "6.18.35"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "7.0.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.14",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47"
                },
                {
                    "url": "https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd"
                }
            ],
            "title": "USB: serial: mxuport: fix memory corruption with small endpoint",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}